diff --git a/src/cmd/godoc/godoc.go b/src/cmd/godoc/godoc.go
index 4e684aa..d086cef 100644
--- a/src/cmd/godoc/godoc.go
+++ b/src/cmd/godoc/godoc.go
@@ -27,6 +27,7 @@
 package main
 
 import (
+	"bytes";
 	"container/vector";
 	"flag";
 	"fmt";
@@ -198,7 +199,7 @@
 
 // Return text for an AST node.
 func nodeText(node interface{}, mode uint) []byte {
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	tw := makeTabwriter(&buf);
 	printer.Fprint(tw, node, mode);
 	tw.Flush();
@@ -214,15 +215,15 @@
 	case []byte:
 		return v;
 	case string:
-		return io.StringBytes(v);
+		return strings.Bytes(v);
 	case String:
-		return io.StringBytes(v.String());
+		return strings.Bytes(v.String());
 	case ast.Decl:
 		return nodeText(v, printer.ExportsOnly);
 	case ast.Expr:
 		return nodeText(v, printer.ExportsOnly);
 	}
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	fmt.Fprint(&buf, x);
 	return buf.Data();
 }
@@ -315,7 +316,7 @@
 
 func serveParseErrors(c *http.Conn, errors *parseErrors) {
 	// format errors
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	parseerrorHtml.Execute(errors, &buf);
 	servePage(c, errors.filename + " - Parse Errors", buf.Data());
 }
@@ -328,7 +329,7 @@
 		return;
 	}
 
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	fmt.Fprintln(&buf, "<pre>");
 	template.HtmlEscape(&buf, nodeText(prog, printer.DocComments));
 	fmt.Fprintln(&buf, "</pre>");
@@ -518,7 +519,7 @@
 		return;
 	}
 
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	if false {	// TODO req.Params["format"] == "text"
 		err := packageText.Execute(PageInfo{pdoc, dirs}, &buf);
 		if err != nil {
@@ -571,7 +572,7 @@
 		return false;
 	}
 
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	io.Copy(r, &buf);
 	wait, err := os.Wait(pid, 0);
 	if err != nil {
diff --git a/src/pkg/Make.deps b/src/pkg/Make.deps
index 6a5a0c4..4a8444b 100644
--- a/src/pkg/Make.deps
+++ b/src/pkg/Make.deps
@@ -2,7 +2,7 @@
 base64.install: bytes.install io.install os.install strconv.install
 bignum.install: fmt.install
 bufio.install: io.install os.install strconv.install utf8.install
-bytes.install: utf8.install
+bytes.install: os.install utf8.install
 compress/flate.install: bufio.install io.install os.install strconv.install
 compress/gzip.install: bufio.install compress/flate.install hash.install hash/crc32.install io.install os.install
 container/list.install:
@@ -12,41 +12,41 @@
 crypto/hmac.install: crypto/md5.install crypto/sha1.install hash.install os.install
 crypto/md5.install: hash.install os.install
 crypto/sha1.install: hash.install os.install
-datafmt.install: container/vector.install fmt.install go/scanner.install go/token.install io.install os.install reflect.install runtime.install strconv.install strings.install
+datafmt.install: bytes.install container/vector.install fmt.install go/scanner.install go/token.install io.install os.install reflect.install runtime.install strconv.install strings.install
 exec.install: os.install strings.install
-exvar.install: fmt.install http.install io.install log.install strconv.install sync.install
+exvar.install: bytes.install fmt.install http.install io.install log.install strconv.install sync.install
 flag.install: fmt.install os.install strconv.install
 fmt.install: io.install os.install reflect.install strconv.install utf8.install
 go/ast.install: go/token.install unicode.install utf8.install
 go/doc.install: container/vector.install fmt.install go/ast.install go/token.install io.install once.install regexp.install sort.install strings.install template.install
-go/parser.install: container/vector.install fmt.install go/ast.install go/scanner.install go/token.install io.install os.install
-go/printer.install: fmt.install go/ast.install go/token.install io.install os.install reflect.install
+go/parser.install: bytes.install container/vector.install fmt.install go/ast.install go/scanner.install go/token.install io.install os.install strings.install
+go/printer.install: fmt.install go/ast.install go/token.install io.install os.install reflect.install strings.install
 go/scanner.install: go/token.install strconv.install unicode.install utf8.install
 go/token.install: strconv.install
 hash.install: io.install
 hash/adler32.install: hash.install os.install
 hash/crc32.install: hash.install os.install
 http.install: bufio.install bytes.install container/vector.install fmt.install io.install log.install net.install os.install path.install strconv.install strings.install utf8.install
-io.install: bytes.install os.install sync.install
-json.install: container/vector.install fmt.install io.install math.install reflect.install strconv.install strings.install utf8.install
+io.install: bytes.install os.install strings.install sync.install
+json.install: bytes.install container/vector.install fmt.install io.install math.install reflect.install strconv.install strings.install utf8.install
 log.install: fmt.install io.install os.install runtime.install time.install
 malloc.install:
 math.install:
 net.install: fmt.install io.install once.install os.install reflect.install strconv.install strings.install sync.install syscall.install
 once.install: sync.install
 os.install: once.install syscall.install
-path.install: io.install
+path.install: strings.install
 rand.install:
 reflect.install: strconv.install sync.install utf8.install
-regexp.install: container/vector.install io.install os.install runtime.install utf8.install
+regexp.install: bytes.install container/vector.install io.install os.install runtime.install utf8.install
 runtime.install:
 sort.install:
 strconv.install: bytes.install math.install os.install utf8.install
 strings.install: utf8.install
 sync.install:
 syscall.install: sync.install
-tabwriter.install: container/vector.install io.install os.install utf8.install
-template.install: container/vector.install fmt.install io.install os.install reflect.install runtime.install strings.install
+tabwriter.install: bytes.install container/vector.install io.install os.install utf8.install
+template.install: bytes.install container/vector.install fmt.install io.install os.install reflect.install runtime.install strings.install
 testing.install: flag.install fmt.install os.install regexp.install runtime.install
 testing/iotest.install: io.install log.install os.install
 time.install: io.install once.install os.install syscall.install
diff --git a/src/pkg/archive/tar/untar_test.go b/src/pkg/archive/tar/untar_test.go
index 3241c17..11f7735 100644
--- a/src/pkg/archive/tar/untar_test.go
+++ b/src/pkg/archive/tar/untar_test.go
@@ -11,6 +11,7 @@
 	"io";
 	"os";
 	"reflect";
+	"strings";
 	"testing";
 )
 
@@ -127,7 +128,7 @@
 	if n, err := io.ReadFull(tr, buf); err != nil {
 		t.Fatalf("Unexpected error: %v", err);
 	}
-	if expected := io.StringBytes("Kilt"); !bytes.Equal(buf, expected) {
+	if expected := strings.Bytes("Kilt"); !bytes.Equal(buf, expected) {
 		t.Errorf("Contents = %v, want %v", buf, expected);
 	}
 
@@ -140,7 +141,7 @@
 	if n, err := io.ReadFull(tr, buf); err != nil {
 		t.Fatalf("Unexpected error: %v", err);
 	}
-	if expected := io.StringBytes("Google"); !bytes.Equal(buf, expected) {
+	if expected := strings.Bytes("Google"); !bytes.Equal(buf, expected) {
 		t.Errorf("Contents = %v, want %v", buf, expected);
 	}
 }
diff --git a/src/pkg/base64/base64_test.go b/src/pkg/base64/base64_test.go
index d11d99a..a9e3738 100644
--- a/src/pkg/base64/base64_test.go
+++ b/src/pkg/base64/base64_test.go
@@ -10,6 +10,7 @@
 	"io";
 	"os";
 	"reflect";
+	"strings";
 	"testing";
 )
 
@@ -62,26 +63,26 @@
 func TestEncode(t *testing.T) {
 	for _, p := range pairs {
 		buf := make([]byte, StdEncoding.EncodedLen(len(p.decoded)));
-		StdEncoding.Encode(io.StringBytes(p.decoded), buf);
+		StdEncoding.Encode(strings.Bytes(p.decoded), buf);
 		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded);
 	}
 }
 
 func TestEncoder(t *testing.T) {
 	for _, p := range pairs {
-		bb := &io.ByteBuffer{};
+		bb := &bytes.Buffer{};
 		encoder := NewEncoder(StdEncoding, bb);
-		encoder.Write(io.StringBytes(p.decoded));
+		encoder.Write(strings.Bytes(p.decoded));
 		encoder.Close();
 		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(bb.Data()), p.encoded);
 	}
 }
 
 func TestEncoderBuffering(t *testing.T) {
-	input := io.StringBytes(bigtest.decoded);
+	input := strings.Bytes(bigtest.decoded);
 	for bs := 1; bs <= 12; bs++ {
 		buf := make([]byte, bs);
-		bb := &io.ByteBuffer{};
+		bb := &bytes.Buffer{};
 		encoder := NewEncoder(StdEncoding, bb);
 		for pos := 0; pos < len(input); pos += bs {
 			end := pos+bs;
@@ -101,7 +102,7 @@
 func TestDecode(t *testing.T) {
 	for _, p := range pairs {
 		dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
-		count, end, err := StdEncoding.decode(io.StringBytes(p.encoded), dbuf);
+		count, end, err := StdEncoding.decode(strings.Bytes(p.encoded), dbuf);
 		testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil));
 		testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded));
 		if len(p.encoded) > 0 {
@@ -113,7 +114,7 @@
 
 func TestDecoder(t *testing.T) {
 	for _, p := range pairs {
-		decoder := NewDecoder(StdEncoding, io.NewByteReader(io.StringBytes(p.encoded)));
+		decoder := NewDecoder(StdEncoding, io.NewByteReader(strings.Bytes(p.encoded)));
 		dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
 		count, err := decoder.Read(dbuf);
 		if err != nil && err != os.EOF {
@@ -129,7 +130,7 @@
 }
 
 func TestDecoderBuffering(t *testing.T) {
-	input := io.StringBytes(bigtest.encoded);
+	input := strings.Bytes(bigtest.encoded);
 	for bs := 1; bs <= 12; bs++ {
 		decoder := NewDecoder(StdEncoding, io.NewByteReader(input));
 		buf := make([]byte, len(bigtest.decoded) + 12);
@@ -159,7 +160,7 @@
 
 	for _, e := range examples {
 		dbuf := make([]byte, StdEncoding.DecodedLen(len(e.e)));
-		count, err := StdEncoding.Decode(io.StringBytes(e.e), dbuf);
+		count, err := StdEncoding.Decode(strings.Bytes(e.e), dbuf);
 		switch err := err.(type) {
 		case CorruptInputError:
 			testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p);
@@ -176,7 +177,7 @@
 	for i := 0; i < n; i++ {
 		raw[i] = alpha[i%len(alpha)];
 	}
-	encoded := new(io.ByteBuffer);
+	encoded := new(bytes.Buffer);
 	w := NewEncoder(StdEncoding, encoded);
 	nn, err := w.Write(raw);
 	if nn != n || err != nil {
@@ -190,7 +191,7 @@
 	if err != nil {
 		t.Fatalf("io.ReadAll(NewDecoder(...)): %v", err);
 	}
-	
+
 	if !bytes.Equal(raw, decoded) {
 		var i int;
 		for i = 0; i < len(decoded) && i < len(raw); i++ {
diff --git a/src/pkg/bufio/bufio_test.go b/src/pkg/bufio/bufio_test.go
index dfb9e3a..9aab267 100644
--- a/src/pkg/bufio/bufio_test.go
+++ b/src/pkg/bufio/bufio_test.go
@@ -5,10 +5,12 @@
 package bufio
 
 import (
+	"bytes";
 	"bufio";
 	"fmt";
 	"io";
 	"os";
+	"strings";
 	"testing";
 	"testing/iotest";
 )
@@ -59,7 +61,7 @@
 }
 
 func TestReaderSimple(t *testing.T) {
-	data := io.StringBytes("hello world");
+	data := strings.Bytes("hello world");
 	b := NewReader(io.NewByteReader(data));
 	if s := readBytes(b); s != "hello world" {
 		t.Errorf("simple hello world test failed: got %q", s);
@@ -146,7 +148,7 @@
 
 	for h := 0; h < len(texts); h++ {
 		text := texts[h];
-		textbytes := io.StringBytes(text);
+		textbytes := strings.Bytes(text);
 		for i := 0; i < len(readMakers); i++ {
 			for j := 0; j < len(bufreaders); j++ {
 				for k := 0; k < len(bufsizes); k++ {
@@ -172,7 +174,7 @@
 	for i := 0; i < len(data); i++ {
 		data[i] = byte(' '+ i%('~'-' '));
 	}
-	w := new(io.ByteBuffer);
+	w := new(bytes.Buffer);
 	for i := 0; i < len(bufsizes); i++ {
 		for j := 0; j < len(bufsizes); j++ {
 			nwrite := bufsizes[i];
@@ -237,7 +239,7 @@
 func TestWriteErrors(t *testing.T) {
 	for i, w := range errorWriterTests {
 		buf := NewWriter(w);
-		n, e := buf.Write(io.StringBytes("hello world"));
+		n, e := buf.Write(strings.Bytes("hello world"));
 		if e != nil {
 			t.Errorf("Write hello to %v: %v", w, e);
 			continue;
@@ -251,7 +253,7 @@
 
 func TestNewReaderSizeIdempotent(t *testing.T) {
 	const BufSize = 1000;
-	b, err := NewReaderSize(io.NewByteReader(io.StringBytes("hello world")), BufSize);
+	b, err := NewReaderSize(io.NewByteReader(strings.Bytes("hello world")), BufSize);
 	if err != nil {
 		t.Error("NewReaderSize create fail", err);
 	}
@@ -275,7 +277,7 @@
 
 func TestNewWriterSizeIdempotent(t *testing.T) {
 	const BufSize = 1000;
-	b, err := NewWriterSize(new(io.ByteBuffer), BufSize);
+	b, err := NewWriterSize(new(bytes.Buffer), BufSize);
 	if err != nil {
 		t.Error("NewWriterSize create fail", err);
 	}
diff --git a/src/pkg/bytes/Makefile b/src/pkg/bytes/Makefile
index 5220d28..9607122 100644
--- a/src/pkg/bytes/Makefile
+++ b/src/pkg/bytes/Makefile
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
+
 # DO NOT EDIT.  Automatically generated by gobuild.
 # gobuild -m >Makefile
 
@@ -20,7 +21,7 @@
 
 coverage: packages
 	gotest
-	6cov -g `pwd` | grep -v '_test\.go:'
+	6cov -g $$(pwd) | grep -v '_test\.go:'
 
 %.$O: %.go
 	$(GC) -I_obj $*.go
@@ -32,6 +33,7 @@
 	$(AS) $*.s
 
 O1=\
+	buffer.$O\
 	bytes.$O\
 
 
@@ -39,7 +41,7 @@
 _obj$D/bytes.a: phases
 
 a1: $(O1)
-	$(AR) grc _obj$D/bytes.a bytes.$O
+	$(AR) grc _obj$D/bytes.a buffer.$O bytes.$O
 	rm -f $(O1)
 
 
diff --git a/src/pkg/io/bytebuffer.go b/src/pkg/bytes/buffer.go
similarity index 75%
rename from src/pkg/io/bytebuffer.go
rename to src/pkg/bytes/buffer.go
index 6971c0e..58e06e9 100644
--- a/src/pkg/io/bytebuffer.go
+++ b/src/pkg/bytes/buffer.go
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package io
+package bytes
 
 // Simple byte buffer for marshaling data.
 
 import (
-	"io";
+	"bytes";
 	"os";
 )
 
@@ -19,29 +19,29 @@
 	}
 }
 
-// A ByteBuffer is a simple implementation of the io.Read and io.Write interfaces
-// connected to a buffer of bytes.
-// The zero value for ByteBuffer is an empty buffer ready to use.
-type ByteBuffer struct {
+// A Buffer is a variable-sized buffer of bytes
+// with Read and Write methods.
+// The zero value for Buffer is an empty buffer ready to use.
+type Buffer struct {
 	buf	[]byte;	// contents are the bytes buf[off : len(buf)]
 	off	int;	// read at &buf[off], write at &buf[len(buf)]
 }
 
 // Data returns the contents of the unread portion of the buffer;
 // len(b.Data()) == b.Len().
-func (b *ByteBuffer) Data() []byte {
+func (b *Buffer) Data() []byte {
 	return b.buf[b.off : len(b.buf)]
 }
 
 // Len returns the number of bytes of the unread portion of the buffer;
 // b.Len() == len(b.Data()).
-func (b *ByteBuffer) Len() int {
+func (b *Buffer) Len() int {
 	return len(b.buf) - b.off
 }
 
 // Truncate discards all but the first n unread bytes from the buffer.
 // It is an error to call b.Truncate(n) with n > b.Len().
-func (b *ByteBuffer) Truncate(n int) {
+func (b *Buffer) Truncate(n int) {
 	if n == 0 {
 		// Reuse buffer space.
 		b.off = 0;
@@ -51,13 +51,13 @@
 
 // Reset resets the buffer so it has no content.
 // b.Reset() is the same as b.Truncate(0).
-func (b *ByteBuffer) Reset() {
+func (b *Buffer) Reset() {
 	b.Truncate(0);
 }
 
 // Write appends the contents of p to the buffer.  The return
 // value n is the length of p; err is always nil.
-func (b *ByteBuffer) Write(p []byte) (n int, err os.Error) {
+func (b *Buffer) Write(p []byte) (n int, err os.Error) {
 	m := b.Len();
 	n = len(p);
 
@@ -81,7 +81,7 @@
 // WriteByte appends the byte c to the buffer.
 // The returned error is always nil, but is included
 // to match bufio.Writer's WriteByte.
-func (b *ByteBuffer) WriteByte(c byte) os.Error {
+func (b *Buffer) WriteByte(c byte) os.Error {
 	b.Write([]byte{c});
 	return nil;
 }
@@ -90,7 +90,7 @@
 // is drained.  The return value n is the number of bytes read.  If the
 // buffer has no data to return, err is os.EOF even if len(p) is zero;
 // otherwise it is nil.
-func (b *ByteBuffer) Read(p []byte) (n int, err os.Error) {
+func (b *Buffer) Read(p []byte) (n int, err os.Error) {
 	if b.off >= len(b.buf) {
 		return 0, os.EOF
 	}
@@ -109,7 +109,7 @@
 
 // ReadByte reads and returns the next byte from the buffer.
 // If no byte is available, it returns error os.EOF.
-func (b *ByteBuffer) ReadByte() (c byte, err os.Error) {
+func (b *Buffer) ReadByte() (c byte, err os.Error) {
 	if b.off >= len(b.buf) {
 		return 0, os.EOF;
 	}
@@ -118,8 +118,8 @@
 	return c, nil;
 }
 
-// NewByteBufferFromArray creates and initializes a new ByteBuffer
-// with buf as its initial contents.
-func NewByteBufferFromArray(buf []byte) *ByteBuffer {
-	return &ByteBuffer{buf, 0};
+// NewBuffer creates and initializes a new Buffer
+// using buf as its initial contents.
+func NewBuffer(buf []byte) *Buffer {
+	return &Buffer{buf, 0};
 }
diff --git a/src/pkg/io/bytebuffer_test.go b/src/pkg/bytes/buffer_test.go
similarity index 100%
rename from src/pkg/io/bytebuffer_test.go
rename to src/pkg/bytes/buffer_test.go
diff --git a/src/pkg/bytes/bytes_test.go b/src/pkg/bytes/bytes_test.go
index 01adbcc..a3e4426 100644
--- a/src/pkg/bytes/bytes_test.go
+++ b/src/pkg/bytes/bytes_test.go
@@ -6,7 +6,7 @@
 
 import (
 	"bytes";
-	"io";
+	"strings";
 	"testing";
 )
 
@@ -59,8 +59,8 @@
 func TestCompare(t *testing.T) {
 	for i := 0; i < len(comparetests); i++ {
 		tt := comparetests[i];
-		a := io.StringBytes(tt.a);
-		b := io.StringBytes(tt.b);
+		a := strings.Bytes(tt.a);
+		b := strings.Bytes(tt.b);
 		cmp := Compare(a, b);
 		eql := Equal(a, b);
 		if cmp != tt.cmp {
@@ -85,7 +85,7 @@
 }
 func TestExplode(t *testing.T) {
 	for _, tt := range(explodetests) {
-		a := explode(io.StringBytes(tt.s), tt.n);
+		a := explode(strings.Bytes(tt.s), tt.n);
 		result := arrayOfString(a);
 		if !eq(result, tt.a) {
 			t.Errorf(`Explode("%s", %d) = %v; want %v`, tt.s, tt.n, result, tt.a);
@@ -122,13 +122,13 @@
 }
 func TestSplit(t *testing.T) {
 	for _, tt := range splittests {
-		a := Split(io.StringBytes(tt.s), io.StringBytes(tt.sep), tt.n);
+		a := Split(strings.Bytes(tt.s), strings.Bytes(tt.sep), tt.n);
 		result := arrayOfString(a);
 		if !eq(result, tt.a) {
 			t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a);
 			continue;
 		}
-		s := Join(a, io.StringBytes(tt.sep));
+		s := Join(a, strings.Bytes(tt.sep));
 		if string(s) != tt.s {
 			t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s);
 		}
@@ -154,8 +154,8 @@
 func TestCopy(t *testing.T) {
 	for i := 0; i < len(copytests); i++ {
 		tt := copytests[i];
-		dst := io.StringBytes(tt.a);
-		n := Copy(dst, io.StringBytes(tt.b));
+		dst := strings.Bytes(tt.a);
+		n := Copy(dst, strings.Bytes(tt.b));
 		result := string(dst);
 		if result != tt.res || n != tt.n {
 			t.Errorf(`Copy(%q, %q) = %d, %q; want %d, %q`, tt.a, tt.b, n, result, tt.n, tt.res);
diff --git a/src/pkg/compress/gzip/gunzip_test.go b/src/pkg/compress/gzip/gunzip_test.go
index 7771b3d..b8c9c71 100644
--- a/src/pkg/compress/gzip/gunzip_test.go
+++ b/src/pkg/compress/gzip/gunzip_test.go
@@ -5,6 +5,7 @@
 package gzip
 
 import (
+	"bytes";
 	"compress/gzip";
 	"fmt";
 	"io";
@@ -265,7 +266,7 @@
 }
 
 func TestGzipInflater(t *testing.T) {
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for i, tt := range gzipTests {
 		in := io.NewByteReader(tt.gzip);
 		gzip, err := NewGzipInflater(in);
diff --git a/src/pkg/crypto/block/cbc_aes_test.go b/src/pkg/crypto/block/cbc_aes_test.go
index 4681c1c..0c10b17 100644
--- a/src/pkg/crypto/block/cbc_aes_test.go
+++ b/src/pkg/crypto/block/cbc_aes_test.go
@@ -13,6 +13,7 @@
 // gobuild: $GC ecb_aes_test.go
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"io";
@@ -80,7 +81,7 @@
 			continue;
 		}
 
-		var crypt io.ByteBuffer;
+		var crypt bytes.Buffer;
 		w := NewCBCEncrypter(c, tt.iv, &crypt);
 		var r io.Reader = io.NewByteReader(tt.in);
 		n, err := io.Copy(r, w);
@@ -90,7 +91,7 @@
 			t.Errorf("%s: CBCEncrypter\nhave %x\nwant %x", test, d, tt.out);
 		}
 
-		var plain io.ByteBuffer;
+		var plain bytes.Buffer;
 		r = NewCBCDecrypter(c, tt.iv, io.NewByteReader(tt.out));
 		w = &plain;
 		n, err = io.Copy(r, w);
diff --git a/src/pkg/crypto/block/cfb_aes_test.go b/src/pkg/crypto/block/cfb_aes_test.go
index 6c793db..95b2511 100644
--- a/src/pkg/crypto/block/cfb_aes_test.go
+++ b/src/pkg/crypto/block/cfb_aes_test.go
@@ -13,6 +13,7 @@
 // gobuild: $GC ecb_aes_test.go
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"io";
@@ -289,7 +290,7 @@
 			continue;
 		}
 
-		var crypt io.ByteBuffer;
+		var crypt bytes.Buffer;
 		w := NewCFBEncrypter(c, tt.s, tt.iv, &crypt);
 		var r io.Reader = io.NewByteReader(tt.in);
 		n, err := io.Copy(r, w);
@@ -299,7 +300,7 @@
 			t.Errorf("%s: CFBEncrypter\nhave %x\nwant %x", test, d, tt.out);
 		}
 
-		var plain io.ByteBuffer;
+		var plain bytes.Buffer;
 		r = NewCFBDecrypter(c, tt.s, tt.iv, io.NewByteReader(tt.out));
 		w = &plain;
 		n, err = io.Copy(r, w);
diff --git a/src/pkg/crypto/block/ctr_aes_test.go b/src/pkg/crypto/block/ctr_aes_test.go
index a3da1b5..dceb85a 100644
--- a/src/pkg/crypto/block/ctr_aes_test.go
+++ b/src/pkg/crypto/block/ctr_aes_test.go
@@ -11,6 +11,7 @@
 package block
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"io";
@@ -83,7 +84,7 @@
 		}
 
 		for j := 0; j <= 5; j += 5 {
-			var crypt io.ByteBuffer;
+			var crypt bytes.Buffer;
 			in := tt.in[0:len(tt.in) - j];
 			w := block.NewCTRWriter(c, tt.iv, &crypt);
 			var r io.Reader = io.NewByteReader(in);
@@ -96,7 +97,7 @@
 		}
 
 		for j := 0; j <= 7; j += 7 {
-			var plain io.ByteBuffer;
+			var plain bytes.Buffer;
 			out := tt.out[0:len(tt.out) - j];
 			r := block.NewCTRReader(c, tt.iv, io.NewByteReader(out));
 			w := &plain;
diff --git a/src/pkg/crypto/block/eax_aes_test.go b/src/pkg/crypto/block/eax_aes_test.go
index f0453be..b4280ee 100644
--- a/src/pkg/crypto/block/eax_aes_test.go
+++ b/src/pkg/crypto/block/eax_aes_test.go
@@ -5,6 +5,7 @@
 package block
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"fmt";
@@ -195,7 +196,7 @@
 }
 
 func TestEAXEncrypt_AES(t *testing.T) {
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for i, tt := range eaxAESTests {
 		test := fmt.Sprintf("test %d", i);
 		c, err := aes.NewCipher(tt.key);
@@ -219,7 +220,7 @@
 }
 
 func TestEAXDecrypt_AES(t *testing.T) {
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for i, tt := range eaxAESTests {
 		test := fmt.Sprintf("test %d", i);
 		c, err := aes.NewCipher(tt.key);
diff --git a/src/pkg/crypto/block/ecb_aes_test.go b/src/pkg/crypto/block/ecb_aes_test.go
index de8a624..518897d 100644
--- a/src/pkg/crypto/block/ecb_aes_test.go
+++ b/src/pkg/crypto/block/ecb_aes_test.go
@@ -11,6 +11,7 @@
 package block
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"io";
@@ -109,7 +110,7 @@
 			continue;
 		}
 
-		var crypt io.ByteBuffer;
+		var crypt bytes.Buffer;
 		w := NewECBEncrypter(c, &crypt);
 		var r io.Reader = io.NewByteReader(tt.in);
 		n, err := io.Copy(r, w);
@@ -119,7 +120,7 @@
 			t.Errorf("%s: ECBReader\nhave %x\nwant %x", test, d, tt.out);
 		}
 
-		var plain io.ByteBuffer;
+		var plain bytes.Buffer;
 		r = NewECBDecrypter(c, io.NewByteReader(tt.out));
 		w = &plain;
 		n, err = io.Copy(r, w);
diff --git a/src/pkg/crypto/block/ecb_test.go b/src/pkg/crypto/block/ecb_test.go
index 968893a..8722265 100644
--- a/src/pkg/crypto/block/ecb_test.go
+++ b/src/pkg/crypto/block/ecb_test.go
@@ -5,6 +5,7 @@
 package block
 
 import (
+	"bytes";
 	"crypto/block";
 	"fmt";
 	"io";
@@ -55,7 +56,7 @@
 	for i := 0; i < len(plain); i++ {
 		plain[i] = byte(i);
 	}
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for block := 1; block <= 64; block *= 2 {
 		// compute encrypted version
 		delta := byte(0);
@@ -119,7 +120,7 @@
 	for i := 0; i < len(plain); i++ {
 		plain[i] = byte(255 - i);
 	}
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for block := 1; block <= 64 && block <= maxio; block *= 2 {
 		// compute encrypted version
 		delta := byte(0);
diff --git a/src/pkg/crypto/block/ofb_aes_test.go b/src/pkg/crypto/block/ofb_aes_test.go
index 3f5f9f4..96673fe 100644
--- a/src/pkg/crypto/block/ofb_aes_test.go
+++ b/src/pkg/crypto/block/ofb_aes_test.go
@@ -13,6 +13,7 @@
 // gotest: $GC ecb_aes_test.go
 
 import (
+	"bytes";
 	"crypto/aes";
 	"crypto/block";
 	"io";
@@ -81,7 +82,7 @@
 		}
 
 		for j := 0; j <= 5; j += 5 {
-			var crypt io.ByteBuffer;
+			var crypt bytes.Buffer;
 			in := tt.in[0:len(tt.in) - j];
 			w := NewOFBWriter(c, tt.iv, &crypt);
 			var r io.Reader = io.NewByteReader(in);
@@ -94,7 +95,7 @@
 		}
 
 		for j := 0; j <= 7; j += 7 {
-			var plain io.ByteBuffer;
+			var plain bytes.Buffer;
 			out := tt.out[0:len(tt.out) - j];
 			r := NewOFBReader(c, tt.iv, io.NewByteReader(out));
 			w := &plain;
diff --git a/src/pkg/crypto/block/xor_test.go b/src/pkg/crypto/block/xor_test.go
index 6e6d1a3..1dca92e 100644
--- a/src/pkg/crypto/block/xor_test.go
+++ b/src/pkg/crypto/block/xor_test.go
@@ -5,6 +5,7 @@
 package block
 
 import (
+	"bytes";
 	"crypto/block";
 	"fmt";
 	"io";
@@ -38,7 +39,7 @@
 	for i := 0; i < len(plain); i++ {
 		plain[i] = byte(i);
 	}
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for block := 1; block <= 64 && block <= maxio; block *= 2 {
 		// compute encrypted version
 		n := byte(0);
@@ -106,7 +107,7 @@
 	for i := 0; i < len(plain); i++ {
 		plain[i] = byte(255 - i);
 	}
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	for block := 1; block <= 64 && block <= maxio; block *= 2 {
 		// compute encrypted version
 		n := byte(0);
diff --git a/src/pkg/crypto/hmac/hmac_test.go b/src/pkg/crypto/hmac/hmac_test.go
index 01e532d..74fcacf 100644
--- a/src/pkg/crypto/hmac/hmac_test.go
+++ b/src/pkg/crypto/hmac/hmac_test.go
@@ -9,8 +9,8 @@
 import (
 	"hash";
 	"crypto/hmac";
-	"io";
 	"fmt";
+	"strings";
 	"testing";
 )
 
@@ -36,7 +36,7 @@
 			0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
 			0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
 		},
-		io.StringBytes("Sample #1"),
+		strings.Bytes("Sample #1"),
 		"4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a",
 	},
 	hmacTest {
@@ -46,7 +46,7 @@
 			0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
 			0x40, 0x41, 0x42, 0x43,
 		},
-		io.StringBytes("Sample #2"),
+		strings.Bytes("Sample #2"),
 		"0922d3405faa3d194f82a45830737d5cc6c75d24",
 	},
 	hmacTest {
@@ -66,15 +66,15 @@
 			0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 			0xb0, 0xb1, 0xb2, 0xb3,
 		},
-		io.StringBytes("Sample #3"),
+		strings.Bytes("Sample #3"),
 		"bcf41eab8bb2d802f3d05caf7cb092ecf8d1a3aa",
 	},
 
 	// Test from Plan 9.
 	hmacTest {
 		NewMD5,
-		io.StringBytes("Jefe"),
-		io.StringBytes("what do ya want for nothing?"),
+		strings.Bytes("Jefe"),
+		strings.Bytes("what do ya want for nothing?"),
 		"750c783e6ab0b503eaa86e310a5db738",
 	}
 }
diff --git a/src/pkg/datafmt/datafmt.go b/src/pkg/datafmt/datafmt.go
index 0aedbbb..48c24e7 100644
--- a/src/pkg/datafmt/datafmt.go
+++ b/src/pkg/datafmt/datafmt.go
@@ -12,7 +12,7 @@
 	A format specification is a set of package declarations and format rules:
 
 		Format      = [ Entry { ";" Entry } [ ";" ] ] .
-		Entry       = PackageDecl | FormatRule . 
+		Entry       = PackageDecl | FormatRule .
 
 	(The syntax of a format specification is presented in the same EBNF
 	notation as used in the Go language specification. The syntax of white
@@ -111,7 +111,7 @@
 
 	The following example shows a complete format specification for a
 	struct 'myPackage.Point'. Assume the package
-	
+
 		package myPackage  // in directory myDir/myPackage
 		type Point struct {
 			name string;
@@ -155,7 +155,7 @@
 
 		Repetition  = "{" Body [ "/" Separator ] "}" .
 		Separator   = Expression .
-	
+
 	A repeated expression is evaluated as follows: The body is evaluated
 	repeatedly and its results are concatenated until the body evaluates
 	to nil. The result of the repetition is the (possibly empty) concatenation,
@@ -202,6 +202,7 @@
 package datafmt
 
 import (
+	"bytes";
 	"container/vector";
 	"fmt";
 	"go/token";
@@ -306,8 +307,8 @@
 	env Environment;  // user-supplied environment
 	errors chan os.Error;  // not chan *Error (errors <- nil would be wrong!)
 	hasOutput bool;  // true after the first literal has been written
-	indent io.ByteBuffer;  // current indentation
-	output io.ByteBuffer;  // format output
+	indent bytes.Buffer;  // current indentation
+	output bytes.Buffer;  // format output
 	linePos token.Position;  // position of line beginning (Column == 0)
 	default_ expr;  // possibly nil
 	separator expr;  // possibly nil
@@ -418,7 +419,7 @@
 	if val.Kind() != reflect.StructKind {
 		return nil, 0;
 	}
-	
+
 	sval, styp := val.(reflect.StructValue), val.Type().(reflect.StructType);
 
 	// look for field at the top level
@@ -450,7 +451,7 @@
 			}
 		}
 	}
-	
+
 	return field, level + 1;
 }
 
@@ -668,7 +669,7 @@
 			s.restore(mark);
 			b = false;
 		}
-		
+
 		// reset indentation
 		s.indent.Truncate(indentLen);
 		return b;
@@ -780,7 +781,7 @@
 // partially formatted result followed by an error message.
 //
 func (f Format) Sprint(args ...) string {
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	n, err := f.Fprint(&buf, nil, args);
 	if err != nil {
 		fmt.Fprintf(&buf, "--- Sprint(%s) failed: %v", fmt.Sprint(args), err);
diff --git a/src/pkg/datafmt/datafmt_test.go b/src/pkg/datafmt/datafmt_test.go
index 788c013..9535494 100644
--- a/src/pkg/datafmt/datafmt_test.go
+++ b/src/pkg/datafmt/datafmt_test.go
@@ -7,14 +7,14 @@
 import (
 	"fmt";
 	"datafmt";
-	"io";
 	"os";
+	"strings";
 	"testing";
 )
 
 
 func parse(t *testing.T, form string, fmap FormatterMap) Format {
-	f, err := Parse(io.StringBytes(form), fmap);
+	f, err := Parse(strings.Bytes(form), fmap);
 	if err != nil {
 		t.Errorf("Parse(%s): %v", form, err);
 		return nil;
@@ -55,7 +55,7 @@
 	case "nil":
 		return false;
 	case "testing.T":
-		s.Write(io.StringBytes("testing.T"));
+		s.Write(strings.Bytes("testing.T"));
 		return true;
 	}
 	panic("unreachable");
@@ -115,7 +115,7 @@
 	check(t, ``, ``);
 	check(t, `bool=":%v"`, `:true:false`, true, false);
 	check(t, `int="%b %d %o 0x%x"`, `101010 42 52 0x2a`, 42);
-	
+
 	check(t, `int="%"`, `%`, 42);
 	check(t, `int="%%"`, `%`, 42);
 	check(t, `int="**%%**"`, `**%**`, 42);
@@ -259,13 +259,13 @@
 	`string = "%s";`
 	`ptr = *;`
 	`datafmt.T2 = s ["-" p "-"];`
-	
+
 const F2b =
 	F1 +
 	`string = "%s";`
 	`ptr = *;`
 	`datafmt.T2 = s ("-" p "-" | "empty");`;
-	
+
 func TestStruct2(t *testing.T) {
 	check(t, F2a, "foo", T2{"foo", nil});
 	check(t, F2a, "bar-<17>-", T2{"bar", &T1{17}});
@@ -366,7 +366,7 @@
 const FSlice =
 	`int = "%b";`
 	`array = { * / ", " }`
-	
+
 func TestSlice(t *testing.T) {
 	check(t, FSlice, "10, 11, 101, 111", []int{2, 3, 5, 7});
 }
diff --git a/src/pkg/datafmt/parser.go b/src/pkg/datafmt/parser.go
index 0d597dc..17d4be9 100644
--- a/src/pkg/datafmt/parser.go
+++ b/src/pkg/datafmt/parser.go
@@ -10,7 +10,6 @@
 	"fmt";
 	"go/scanner";
 	"go/token";
-	"io";
 	"os";
 	"strconv";
 	"strings";
@@ -194,7 +193,7 @@
 
 
 func (p *parser) parseLiteral() literal {
-	s := io.StringBytes(p.parseString());
+	s := strings.Bytes(p.parseString());
 
 	// A string literal may contain %-format specifiers. To simplify
 	// and speed up printing of the literal, split it into segments
diff --git a/src/pkg/exvar/exvar.go b/src/pkg/exvar/exvar.go
index 6473f7a..6275e2d 100644
--- a/src/pkg/exvar/exvar.go
+++ b/src/pkg/exvar/exvar.go
@@ -8,6 +8,7 @@
 package exvar
 
 import (
+	"bytes";
 	"fmt";
 	"http";
 	"io";
@@ -52,7 +53,7 @@
 func (v *Map) String() string {
 	v.mu.Lock();
 	defer v.mu.Unlock();
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	fmt.Fprintf(b, "{");
 	first := true;
 	for key, val := range v.m {
diff --git a/src/pkg/fmt/fmt_test.go b/src/pkg/fmt/fmt_test.go
index d530a01..305ab4d 100644
--- a/src/pkg/fmt/fmt_test.go
+++ b/src/pkg/fmt/fmt_test.go
@@ -8,6 +8,7 @@
 	"fmt";
 	"io";
 	"math";
+	"strings";
 	"testing";
 )
 
@@ -40,12 +41,12 @@
 	fmtTest{ "%q",	"abc",	`"abc"` },
 
 	// basic bytes
-	fmtTest{ "%s",	io.StringBytes("abc"),	"abc" },
-	fmtTest{ "%x",	io.StringBytes("abc"),	"616263" },
-	fmtTest{ "% x",	io.StringBytes("abc"),	"61 62 63" },
-	fmtTest{ "%x",	io.StringBytes("xyz"),	"78797a" },
-	fmtTest{ "%X",	io.StringBytes("xyz"),	"78797A" },
-	fmtTest{ "%q",	io.StringBytes("abc"),	`"abc"` },
+	fmtTest{ "%s",	strings.Bytes("abc"),	"abc" },
+	fmtTest{ "%x",	strings.Bytes("abc"),	"616263" },
+	fmtTest{ "% x",	strings.Bytes("abc"),	"61 62 63" },
+	fmtTest{ "%x",	strings.Bytes("xyz"),	"78797a" },
+	fmtTest{ "%X",	strings.Bytes("xyz"),	"78797A" },
+	fmtTest{ "%q",	strings.Bytes("abc"),	`"abc"` },
 
 	// escaped strings
 	fmtTest{ "%#q",	`abc`,		"`abc`" },
diff --git a/src/pkg/go/doc/comment.go b/src/pkg/go/doc/comment.go
index 064080f..ac04e82 100644
--- a/src/pkg/go/doc/comment.go
+++ b/src/pkg/go/doc/comment.go
@@ -142,8 +142,8 @@
 
 
 var (
-	ldquo = io.StringBytes("&ldquo;");
-	rdquo = io.StringBytes("&rdquo;");
+	ldquo = strings.Bytes("&ldquo;");
+	rdquo = strings.Bytes("&rdquo;");
 )
 
 // Escape comment text for HTML.
@@ -168,10 +168,10 @@
 
 
 var (
-	html_p = io.StringBytes("<p>\n");
-	html_endp = io.StringBytes("</p>\n");
-	html_pre = io.StringBytes("<pre>");
-	html_endpre = io.StringBytes("</pre>\n");
+	html_p = strings.Bytes("<p>\n");
+	html_endp = strings.Bytes("</p>\n");
+	html_pre = strings.Bytes("<pre>");
+	html_endpre = strings.Bytes("</pre>\n");
 )
 
 
diff --git a/src/pkg/go/parser/parser.go b/src/pkg/go/parser/parser.go
index aabd224..b8bb3b8 100644
--- a/src/pkg/go/parser/parser.go
+++ b/src/pkg/go/parser/parser.go
@@ -10,6 +10,7 @@
 package parser
 
 import (
+	"bytes";
 	"container/vector";
 	"fmt";
 	"go/ast";
@@ -17,6 +18,7 @@
 	"go/token";
 	"io";
 	"os";
+	"strings";
 )
 
 
@@ -1964,16 +1966,16 @@
 	if src != nil {
 		switch s := src.(type) {
 		case string:
-			return io.StringBytes(s), nil;
+			return strings.Bytes(s), nil;
 		case []byte:
 			return s, nil;
-		case *io.ByteBuffer:
-			// is io.Read, but src is already available in []byte form
+		case *bytes.Buffer:
+			// is io.Reader, but src is already available in []byte form
 			if s != nil {
 				return s.Data(), nil;
 			}
 		case io.Reader:
-			var buf io.ByteBuffer;
+			var buf bytes.Buffer;
 			n, err := io.Copy(s, &buf);
 			if err != nil {
 				return nil, err;
@@ -1997,7 +1999,7 @@
 // Parse parses a Go program.
 //
 // The program source src may be provided in a variety of formats. At the
-// moment the following types are supported: string, []byte, and io.Read.
+// moment the following types are supported: string, []byte, and io.Reader.
 // The mode parameter controls the amount of source text parsed and other
 // optional parser functionality.
 //
diff --git a/src/pkg/go/printer/printer.go b/src/pkg/go/printer/printer.go
index 4465314..19cb4d1 100644
--- a/src/pkg/go/printer/printer.go
+++ b/src/pkg/go/printer/printer.go
@@ -12,6 +12,7 @@
 	"io";
 	"os";
 	"reflect";
+	"strings";
 )
 
 
@@ -166,9 +167,9 @@
 		case []byte:
 			p.write(x);
 		case string:
-			p.write(io.StringBytes(x));
+			p.write(strings.Bytes(x));
 		case token.Token:
-			p.write(io.StringBytes(x.String()));
+			p.write(strings.Bytes(x.String()));
 		case token.Position:
 			// set current position
 			p.pos = x;
diff --git a/src/pkg/go/scanner/scanner_test.go b/src/pkg/go/scanner/scanner_test.go
index 0906d5c..17491e6 100644
--- a/src/pkg/go/scanner/scanner_test.go
+++ b/src/pkg/go/scanner/scanner_test.go
@@ -7,7 +7,7 @@
 import (
 	"go/scanner";
 	"go/token";
-	"io";
+	"strings";
 	"testing";
 )
 
@@ -190,7 +190,7 @@
 	// verify scan
 	index := 0;
 	eloc := token.Position{0, 1, 1};
-	nerrors := scanner.Tokenize(io.StringBytes(src), &TestErrorHandler{t}, scanner.ScanComments,
+	nerrors := scanner.Tokenize(strings.Bytes(src), &TestErrorHandler{t}, scanner.ScanComments,
 		func (pos token.Position, tok token.Token, litb []byte) bool {
 			e := elt{token.EOF, "", special};
 			if index < len(tokens) {
@@ -236,7 +236,7 @@
 	var s scanner.Scanner;
 
 	// 1st init
-	s.Init(io.StringBytes("if true { }"), nil, 0);
+	s.Init(strings.Bytes("if true { }"), nil, 0);
 	s.Scan();  // if
 	s.Scan();  // true
 	pos, tok, lit := s.Scan();  // {
@@ -245,7 +245,7 @@
 	}
 
 	// 2nd init
-	s.Init(io.StringBytes("go true { ]"), nil, 0);
+	s.Init(strings.Bytes("go true { ]"), nil, 0);
 	pos, tok, lit = s.Scan();  // go
 	if tok != token.GO {
 		t.Errorf("bad token: got %s, expected %s", tok.String(), token.GO);
@@ -261,7 +261,7 @@
 	var s scanner.Scanner;
 
 	const src = "*?*$*@*";
-	s.Init(io.StringBytes(src), &TestErrorHandler{t}, scanner.AllowIllegalChars);
+	s.Init(strings.Bytes(src), &TestErrorHandler{t}, scanner.AllowIllegalChars);
 	for offs, ch := range src {
 		pos, tok, lit := s.Scan();
 		if pos.Offset != offs {
diff --git a/src/pkg/gob/codec_test.go b/src/pkg/gob/codec_test.go
index 8142aac..9dca42a 100644
--- a/src/pkg/gob/codec_test.go
+++ b/src/pkg/gob/codec_test.go
@@ -7,7 +7,6 @@
 import (
 	"bytes";
 	"gob";
-	"io";
 	"os";
 	"testing";
 )
@@ -36,7 +35,7 @@
 
 // Test basic encode/decode routines for unsigned integers
 func TestUintCodec(t *testing.T) {
-	var b = new(io.ByteBuffer);
+	var b = new(bytes.Buffer);
 	for i, tt := range encodeT {
 		b.Reset();
 		err := EncodeUint(b, tt.x);
@@ -67,7 +66,7 @@
 }
 
 func verifyInt(i int64, t *testing.T) {
-	var b = new(io.ByteBuffer);
+	var b = new(bytes.Buffer);
 	err := EncodeInt(b, i);
 	if err != nil {
 		t.Error("EncodeInt:", i, err)
@@ -83,7 +82,7 @@
 
 // Test basic encode/decode routines for signed integers
 func TestIntCodec(t *testing.T) {
-	var b = new(io.ByteBuffer);
+	var b = new(bytes.Buffer);
 	for u := uint64(0); ; u = (u+1) * 7 {
 		// Do positive and negative values
 		i := int64(u);
diff --git a/src/pkg/http/request.go b/src/pkg/http/request.go
index ef6dbe6..59801e1 100644
--- a/src/pkg/http/request.go
+++ b/src/pkg/http/request.go
@@ -359,7 +359,7 @@
 	// and upper case after each dash.
 	// (Host, User-Agent, If-Modified-Since).
 	// HTTP headers are ASCII only, so no Unicode issues.
-	a := io.StringBytes(s);
+	a := strings.Bytes(s);
 	upper := true;
 	for i,v := range a {
 		if upper && 'a' <= v && v <= 'z' {
diff --git a/src/pkg/http/triv.go b/src/pkg/http/triv.go
index fc95017..546f2a7 100644
--- a/src/pkg/http/triv.go
+++ b/src/pkg/http/triv.go
@@ -5,6 +5,7 @@
 package main
 
 import (
+	"bytes";
 	"bufio";
 	"exvar";
 	"flag";
@@ -41,7 +42,7 @@
 	case "GET":
 		ctr.n++;
 	case "POST":
-		buf := new(io.ByteBuffer);
+		buf := new(bytes.Buffer);
 		io.Copy(req.Body, buf);
 		body := string(buf.Data());
 		if n, err := strconv.Atoi(body); err != nil {
diff --git a/src/pkg/io/Makefile b/src/pkg/io/Makefile
index c3f0dda..e265c99 100644
--- a/src/pkg/io/Makefile
+++ b/src/pkg/io/Makefile
@@ -35,28 +35,22 @@
 O1=\
 	io.$O\
 	pipe.$O\
+	xxx.$O\
 
 O2=\
-	bytebuffer.$O\
-
-O3=\
 	utils.$O\
 
 
-phases: a1 a2 a3
+phases: a1 a2
 _obj$D/io.a: phases
 
 a1: $(O1)
-	$(AR) grc _obj$D/io.a io.$O pipe.$O
+	$(AR) grc _obj$D/io.a io.$O pipe.$O xxx.$O
 	rm -f $(O1)
 
 a2: $(O2)
-	$(AR) grc _obj$D/io.a bytebuffer.$O
-	rm -f $(O2)
-
-a3: $(O3)
 	$(AR) grc _obj$D/io.a utils.$O
-	rm -f $(O3)
+	rm -f $(O2)
 
 
 newpkg: clean
@@ -66,7 +60,6 @@
 $(O1): newpkg
 $(O2): a1
 $(O3): a2
-$(O4): a3
 
 nuke: clean
 	rm -f $(GOROOT)/pkg/$(GOOS)_$(GOARCH)$D/io.a
diff --git a/src/pkg/io/io.go b/src/pkg/io/io.go
index 7a74061..12b9892 100644
--- a/src/pkg/io/io.go
+++ b/src/pkg/io/io.go
@@ -12,6 +12,7 @@
 import (
 	"bytes";
 	"os";
+	"strings";
 )
 
 // Error represents an unexpected I/O behavior.
@@ -83,18 +84,9 @@
 	Closer;
 }
 
-// Convert a string to an array of bytes for easy marshaling.
-func StringBytes(s string) []byte {
-	b := make([]byte, len(s));
-	for i := 0; i < len(s); i++ {
-		b[i] = s[i];
-	}
-	return b;
-}
-
 // WriteString writes the contents of the string s to w, which accepts an array of bytes.
 func WriteString(w Writer, s string) (n int, err os.Error) {
-	return w.Write(StringBytes(s))
+	return w.Write(strings.Bytes(s))
 }
 
 // ReadAtLeast reads from r into buf until it has read at least min bytes.
diff --git a/src/pkg/io/pipe_test.go b/src/pkg/io/pipe_test.go
index 02d5013..6b36cc6 100644
--- a/src/pkg/io/pipe_test.go
+++ b/src/pkg/io/pipe_test.go
@@ -8,6 +8,7 @@
 	"fmt";
 	"io";
 	"os";
+	"strings";
 	"testing";
 	"time";
 )
@@ -28,7 +29,7 @@
 	c := make(chan int);
 	r, w := Pipe();
 	var buf = make([]byte, 64);
-	go checkWrite(t, w, StringBytes("hello, world"), c);
+	go checkWrite(t, w, strings.Bytes("hello, world"), c);
 	n, err := r.Read(buf);
 	if err != nil {
 		t.Errorf("read: %v", err);
diff --git a/src/pkg/io/utils.go b/src/pkg/io/utils.go
index a4cbb2d..96d23bc 100644
--- a/src/pkg/io/utils.go
+++ b/src/pkg/io/utils.go
@@ -7,14 +7,15 @@
 package io
 
 import (
+	"bytes";
 	"io";
 	"os";
 )
 
 // ReadAll reads from r until an error or EOF and returns the data it read.
 func ReadAll(r Reader) ([]byte, os.Error) {
-	var buf ByteBuffer;
-	n, err := io.Copy(r, &buf);
+	var buf bytes.Buffer;
+	n, err := Copy(r, &buf);
 	return buf.Data(), err;
 }
 
diff --git a/src/pkg/json/parse.go b/src/pkg/json/parse.go
index e33b9db..a95d7d2 100644
--- a/src/pkg/json/parse.go
+++ b/src/pkg/json/parse.go
@@ -11,8 +11,8 @@
 package json
 
 import (
+	"bytes";
 	"fmt";
-	"io";
 	"math";
 	"strconv";
 	"strings";
@@ -127,7 +127,7 @@
 func Quote(s string) string {
 	chr := make([]byte, utf8.UTFMax);
 	chr0 := chr[0:1];
-	b := new(io.ByteBuffer);
+	b := new(bytes.Buffer);
 	chr[0] = '"';
 	b.Write(chr0);
 	for i := 0; i < len(s); i++ {
diff --git a/src/pkg/net/dialgoogle_test.go b/src/pkg/net/dialgoogle_test.go
index f259cba..e65aaac 100644
--- a/src/pkg/net/dialgoogle_test.go
+++ b/src/pkg/net/dialgoogle_test.go
@@ -9,6 +9,7 @@
 	"io";
 	"net";
 	"os";
+	"strings";
 	"syscall";
 	"testing";
 )
@@ -19,7 +20,7 @@
 // fd is already connected to the destination, port 80.
 // Run an HTTP request to fetch the appropriate page.
 func fetchGoogle(t *testing.T, fd net.Conn, network, addr string) {
-	req := io.StringBytes("GET /intl/en/privacy.html HTTP/1.0\r\nHost: www.google.com\r\n\r\n");
+	req := strings.Bytes("GET /intl/en/privacy.html HTTP/1.0\r\nHost: www.google.com\r\n\r\n");
 	n, err := fd.Write(req);
 
 	buf := make([]byte, 1000);
diff --git a/src/pkg/net/server_test.go b/src/pkg/net/server_test.go
index f1c7134..92ed683 100644
--- a/src/pkg/net/server_test.go
+++ b/src/pkg/net/server_test.go
@@ -52,7 +52,7 @@
 		t.Fatalf("net.Dial(%q, %q, %q) = _, %v", network, "", addr, err);
 	}
 
-	b := io.StringBytes("hello, world\n");
+	b := strings.Bytes("hello, world\n");
 	var b1 [100]byte;
 
 	n, errno := fd.Write(b);
diff --git a/src/pkg/os/os_test.go b/src/pkg/os/os_test.go
index 3dd9756..8b50cb5 100644
--- a/src/pkg/os/os_test.go
+++ b/src/pkg/os/os_test.go
@@ -5,9 +5,11 @@
 package os
 
 import (
+	"bytes";
 	"fmt";
 	"io";
 	"os";
+	"strings";
 	"testing";
 )
 
@@ -322,7 +324,7 @@
 	}
 	w.Close();
 
-	var b io.ByteBuffer;
+	var b bytes.Buffer;
 	io.Copy(r, &b);
 	output := string(b.Data());
 	expect := "/\n";
@@ -443,7 +445,7 @@
 	}
 
 	checkSize(t, Path, 0);
-	fd.Write(io.StringBytes("hello, world\n"));
+	fd.Write(strings.Bytes("hello, world\n"));
 	checkSize(t, Path, 13);
 	fd.Truncate(10);
 	checkSize(t, Path, 10);
@@ -451,7 +453,7 @@
 	checkSize(t, Path, 1024);
 	fd.Truncate(0);
 	checkSize(t, Path, 0);
-	fd.Write(io.StringBytes("surprise!"));
+	fd.Write(strings.Bytes("surprise!"));
 	checkSize(t, Path, 13 + 9);	// wrote at offset past where hello, world was.
 	fd.Close();
 	Remove(Path);
@@ -600,7 +602,7 @@
 	}
 	w.Close();
 
-	var b io.ByteBuffer;
+	var b bytes.Buffer;
 	io.Copy(r, &b);
 	Wait(pid, 0);
 	output := string(b.Data());
@@ -626,4 +628,3 @@
 		t.Errorf("Hostname() = %q, want %q", hostname, want);
 	}
 }
-
diff --git a/src/pkg/path/path.go b/src/pkg/path/path.go
index a7e2c26..ffc6c69 100644
--- a/src/pkg/path/path.go
+++ b/src/pkg/path/path.go
@@ -6,7 +6,7 @@
 // slash-separated filename paths.
 package path
 
-import "io"
+import "strings"
 
 // Clean returns the shortest path name equivalent to path
 // by purely lexical processing.  It applies the following rules
@@ -38,7 +38,7 @@
 	//	writing to buf; w is index of next byte to write.
 	//	dotdot is index in buf where .. must stop, either because
 	//		it is the leading slash or it is a leading ../../.. prefix.
-	buf := io.StringBytes(path);
+	buf := strings.Bytes(path);
 	r, w, dotdot := 0, 0, 0;
 	if rooted {
 		r, w, dotdot = 1, 1, 1;
diff --git a/src/pkg/regexp/regexp.go b/src/pkg/regexp/regexp.go
index 5fb606a..1ab9246 100644
--- a/src/pkg/regexp/regexp.go
+++ b/src/pkg/regexp/regexp.go
@@ -23,6 +23,7 @@
 package regexp
 
 import (
+	"bytes";
 	"container/vector";
 	"io";
 	"os";
@@ -770,7 +771,7 @@
 func (re *Regexp) ReplaceAll(src, repl string) string {
 	lastMatchEnd := 0; // end position of the most recent match
 	searchPos := 0; // position where we next look for a match
-	buf := new(io.ByteBuffer);
+	buf := new(bytes.Buffer);
 	for searchPos <= len(src) {
 		a := re.doExecute(src, searchPos);
 		if len(a) == 0 {
diff --git a/src/pkg/runtime/mgc0.c b/src/pkg/runtime/mgc0.c
index fedc940..6fea924 100644
--- a/src/pkg/runtime/mgc0.c
+++ b/src/pkg/runtime/mgc0.c
@@ -130,6 +130,7 @@
 			free(p);
 			break;
 		case RefSome:
+//printf("gc-mem 1 %D\n", (uint64)s->npages<<PageShift);
 			s->gcref0 = RefNone;	// set up for next mark phase
 			break;
 		}
@@ -159,6 +160,7 @@
 			break;
 		}
 	}
+//printf("gc-mem %d %d\n", s->ref, size);
 }
 
 static void
@@ -215,6 +217,7 @@
 	if(gcpercent < 0)
 		return;
 
+//printf("gc...\n");
 	m->gcing = 1;
 	semacquire(&gcsema);
 	gosave(&g->sched);	// update g's stack pointer for scanstack
diff --git a/src/pkg/strings/strings.go b/src/pkg/strings/strings.go
index 9b0f031..c76024b 100644
--- a/src/pkg/strings/strings.go
+++ b/src/pkg/strings/strings.go
@@ -202,3 +202,13 @@
 	}
 	return s[start:end];
 }
+
+// Bytes returns an array of the bytes in s.
+func Bytes(s string) []byte {
+	b := make([]byte, len(s));
+	for i := 0; i < len(s); i++ {
+		b[i] = s[i];
+	}
+	return b;
+}
+
diff --git a/src/pkg/tabwriter/tabwriter.go b/src/pkg/tabwriter/tabwriter.go
index aa942d4..d57a1b1 100644
--- a/src/pkg/tabwriter/tabwriter.go
+++ b/src/pkg/tabwriter/tabwriter.go
@@ -10,6 +10,7 @@
 package tabwriter
 
 import (
+	"bytes";
 	"container/vector";
 	"io";
 	"os";
@@ -69,7 +70,7 @@
 	flags uint;
 
 	// current state
-	buf io.ByteBuffer;  // collected text w/o tabs, newlines, or form feed chars
+	buf bytes.Buffer;  // collected text w/o tabs, newlines, or form feed chars
 	pos int;  // buffer position up to which width of incomplete cell has been computed
 	cell cell;  // current incomplete cell; cell.width is up to buf[pos] w/o ignored sections
 	html_char byte;  // terminating char of html tag/entity, or 0 ('>', ';', or 0)
@@ -436,7 +437,7 @@
 				}
 
 			case '<', '&':
-				// possibly an html tag/entity 
+				// possibly an html tag/entity
 				if b.flags & FilterHTML != 0 {
 					// begin of tag/entity
 					b.append(buf[i0 : i], true);
diff --git a/src/pkg/template/format.go b/src/pkg/template/format.go
index 4fb5393..997de4e 100644
--- a/src/pkg/template/format.go
+++ b/src/pkg/template/format.go
@@ -7,9 +7,11 @@
 package template
 
 import (
+	"bytes";
 	"fmt";
 	"io";
 	"reflect";
+	"strings";
 )
 
 // StringFormatter formats into the default string representation.
@@ -21,9 +23,9 @@
 }
 
 
-var esc_amp = io.StringBytes("&amp;")
-var esc_lt = io.StringBytes("&lt;")
-var esc_gt = io.StringBytes("&gt;")
+var esc_amp = strings.Bytes("&amp;")
+var esc_lt = strings.Bytes("&lt;")
+var esc_gt = strings.Bytes("&gt;")
 
 // HtmlEscape writes to w the properly escaped HTML equivalent
 // of the plain text data s.
@@ -48,7 +50,7 @@
 
 // HtmlFormatter formats arbitrary values for HTML
 func HtmlFormatter(w io.Writer, value interface{}, format string) {
-	var b io.ByteBuffer;
+	var b bytes.Buffer;
 	fmt.Fprint(&b, value);
 	HtmlEscape(w, b.Data());
 }
diff --git a/src/pkg/template/template.go b/src/pkg/template/template.go
index a5e9b0c..d44756b 100644
--- a/src/pkg/template/template.go
+++ b/src/pkg/template/template.go
@@ -762,7 +762,7 @@
 	if !validDelim(t.ldelim) || !validDelim(t.rdelim) {
 		return &Error{1, fmt.Sprintf("bad delimiter strings %q %q", t.ldelim, t.rdelim)}
 	}
-	t.buf = io.StringBytes(s);
+	t.buf = strings.Bytes(s);
 	t.p = 0;
 	t.linenum = 0;
 	go func() {
@@ -792,8 +792,8 @@
 // delimiters are very rarely invalid and Parse has the necessary
 // error-handling interface already.
 func (t *Template) SetDelims(left, right string) {
-	t.ldelim = io.StringBytes(left);
-	t.rdelim = io.StringBytes(right);
+	t.ldelim = strings.Bytes(left);
+	t.rdelim = strings.Bytes(right);
 }
 
 // Parse creates a Template with default parameters (such as {} for
diff --git a/src/pkg/template/template_test.go b/src/pkg/template/template_test.go
index 9a81d27..138978b 100644
--- a/src/pkg/template/template_test.go
+++ b/src/pkg/template/template_test.go
@@ -5,6 +5,7 @@
 package template
 
 import (
+	"bytes";
 	"fmt";
 	"io";
 	"os";
@@ -236,7 +237,7 @@
 	s.empty = []*T{ };
 	s.null = nil;
 
-	var buf io.ByteBuffer;
+	var buf bytes.Buffer;
 	for i, test := range tests {
 		buf.Reset();
 		tmpl, err := Parse(test.in, formatters);
@@ -259,7 +260,7 @@
 	if err != nil {
 		t.Error("unexpected parse error:", err)
 	}
-	var b io.ByteBuffer;
+	var b bytes.Buffer;
 	err = tmpl.Execute("hello", &b);
 	if err != nil {
 		t.Error("unexpected execute error:", err)
@@ -275,7 +276,7 @@
 	if err != nil {
 		t.Error("unexpected parse error:", err)
 	}
-	var b io.ByteBuffer;
+	var b bytes.Buffer;
 	err = tmpl.Execute("hello", &b);
 	if err != nil {
 		t.Error("unexpected parse error:", err)
@@ -320,7 +321,7 @@
 				t.Errorf("expected parse error for empty delimiter: %d %d %q %q", i, j, ldelim, rdelim);
 				continue;
 			}
-			var b io.ByteBuffer;
+			var b bytes.Buffer;
 			err = tmpl.Execute("hello", &b);
 			s := string(b.Data());
 			if s != "template: hello" + ldelim + rdelim {
diff --git a/src/pkg/utf8/utf8_test.go b/src/pkg/utf8/utf8_test.go
index f60b0b1..1597a94 100644
--- a/src/pkg/utf8/utf8_test.go
+++ b/src/pkg/utf8/utf8_test.go
@@ -7,7 +7,7 @@
 import (
 	"bytes";
 	"fmt";
-	"io";
+	"strings";
 	"testing";
 	"utf8";
 )
@@ -45,10 +45,10 @@
 	Utf8Map{ 0x10ffff, "\xf4\x8f\xbf\xbf" },
 }
 
-// io.StringBytes with one extra byte at end
+// strings.Bytes with one extra byte at end
 func makeBytes(s string) []byte {
 	s += "\x00";
-	b := io.StringBytes(s);
+	b := strings.Bytes(s);
 	return b[0:len(s)-1];
 }