diff --git a/misc/dashboard/app/app.yaml b/misc/dashboard/app/app.yaml
index 685ca6e3d60..6e19db09c62 100644
--- a/misc/dashboard/app/app.yaml
+++ b/misc/dashboard/app/app.yaml
@@ -6,7 +6,7 @@
 application: golang-org
 version: build
 runtime: go
-api_version: 3
+api_version: go1beta
 
 handlers:
 - url: /static
diff --git a/misc/dashboard/app/build/build.go b/misc/dashboard/app/build/build.go
index 7b73a252150..c49fa8bb2af 100644
--- a/misc/dashboard/app/build/build.go
+++ b/misc/dashboard/app/build/build.go
@@ -8,11 +8,12 @@ import (
 	"bytes"
 	"compress/gzip"
 	"crypto/sha1"
+	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
-	"os"
 	"strings"
+	"time"
 
 	"appengine"
 	"appengine/datastore"
@@ -41,7 +42,7 @@ func (p *Package) Key(c appengine.Context) *datastore.Key {
 }
 
 // LastCommit returns the most recent Commit for this Package.
-func (p *Package) LastCommit(c appengine.Context) (*Commit, os.Error) {
+func (p *Package) LastCommit(c appengine.Context) (*Commit, error) {
 	var commits []*Commit
 	_, err := datastore.NewQuery("Commit").
 		Ancestor(p.Key(c)).
@@ -58,7 +59,7 @@ func (p *Package) LastCommit(c appengine.Context) (*Commit, os.Error) {
 }
 
 // GetPackage fetches a Package by path from the datastore.
-func GetPackage(c appengine.Context, path string) (*Package, os.Error) {
+func GetPackage(c appengine.Context, path string) (*Package, error) {
 	p := &Package{Path: path}
 	err := datastore.Get(c, p.Key(c), p)
 	if err == datastore.ErrNoSuchEntity {
@@ -80,7 +81,7 @@ type Commit struct {
 
 	User string
 	Desc string `datastore:",noindex"`
-	Time datastore.Time
+	Time time.Time
 
 	// ResultData is the Data string of each build Result for this Commit.
 	// For non-Go commits, only the Results for the current Go tip, weekly,
@@ -100,19 +101,19 @@ func (com *Commit) Key(c appengine.Context) *datastore.Key {
 	return datastore.NewKey(c, "Commit", key, 0, p.Key(c))
 }
 
-func (c *Commit) Valid() os.Error {
+func (c *Commit) Valid() error {
 	if !validHash(c.Hash) {
-		return os.NewError("invalid Hash")
+		return errors.New("invalid Hash")
 	}
 	if c.ParentHash != "" && !validHash(c.ParentHash) { // empty is OK
-		return os.NewError("invalid ParentHash")
+		return errors.New("invalid ParentHash")
 	}
 	return nil
 }
 
 // AddResult adds the denormalized Reuslt data to the Commit's Result field.
 // It must be called from inside a datastore transaction.
-func (com *Commit) AddResult(c appengine.Context, r *Result) os.Error {
+func (com *Commit) AddResult(c appengine.Context, r *Result) error {
 	if err := datastore.Get(c, com.Key(c), com); err != nil {
 		return fmt.Errorf("getting Commit: %v", err)
 	}
@@ -192,12 +193,12 @@ func (r *Result) Key(c appengine.Context) *datastore.Key {
 	return datastore.NewKey(c, "Result", key, 0, p.Key(c))
 }
 
-func (r *Result) Valid() os.Error {
+func (r *Result) Valid() error {
 	if !validHash(r.Hash) {
-		return os.NewError("invalid Hash")
+		return errors.New("invalid Hash")
 	}
 	if r.PackagePath != "" && !validHash(r.GoHash) {
-		return os.NewError("invalid GoHash")
+		return errors.New("invalid GoHash")
 	}
 	return nil
 }
@@ -214,7 +215,7 @@ type Log struct {
 	CompressedLog []byte
 }
 
-func (l *Log) Text() ([]byte, os.Error) {
+func (l *Log) Text() ([]byte, error) {
 	d, err := gzip.NewReader(bytes.NewBuffer(l.CompressedLog))
 	if err != nil {
 		return nil, fmt.Errorf("reading log data: %v", err)
@@ -226,14 +227,14 @@ func (l *Log) Text() ([]byte, os.Error) {
 	return b, nil
 }
 
-func PutLog(c appengine.Context, text string) (hash string, err os.Error) {
+func PutLog(c appengine.Context, text string) (hash string, err error) {
 	h := sha1.New()
 	io.WriteString(h, text)
 	b := new(bytes.Buffer)
 	z, _ := gzip.NewWriterLevel(b, gzip.BestCompression)
 	io.WriteString(z, text)
 	z.Close()
-	hash = fmt.Sprintf("%x", h.Sum())
+	hash = fmt.Sprintf("%x", h.Sum(nil))
 	key := datastore.NewKey(c, "Log", hash, 0, nil)
 	_, err = datastore.Put(c, key, &Log{b.Bytes()})
 	return
@@ -252,29 +253,29 @@ func (t *Tag) Key(c appengine.Context) *datastore.Key {
 	return datastore.NewKey(c, "Tag", t.Kind, 0, p.Key(c))
 }
 
-func (t *Tag) Valid() os.Error {
+func (t *Tag) Valid() error {
 	if t.Kind != "weekly" && t.Kind != "release" && t.Kind != "tip" {
-		return os.NewError("invalid Kind")
+		return errors.New("invalid Kind")
 	}
 	if !validHash(t.Hash) {
-		return os.NewError("invalid Hash")
+		return errors.New("invalid Hash")
 	}
 	return nil
 }
 
 // Commit returns the Commit that corresponds with this Tag.
-func (t *Tag) Commit(c appengine.Context) (*Commit, os.Error) {
+func (t *Tag) Commit(c appengine.Context) (*Commit, error) {
 	com := &Commit{Hash: t.Hash}
 	err := datastore.Get(c, com.Key(c), com)
 	return com, err
 }
 
 // GetTag fetches a Tag by name from the datastore.
-func GetTag(c appengine.Context, tag string) (*Tag, os.Error) {
+func GetTag(c appengine.Context, tag string) (*Tag, error) {
 	t := &Tag{Kind: tag}
 	if err := datastore.Get(c, t.Key(c), t); err != nil {
 		if err == datastore.ErrNoSuchEntity {
-			return nil, os.NewError("tag not found: " + tag)
+			return nil, errors.New("tag not found: " + tag)
 		}
 		return nil, err
 	}
@@ -286,11 +287,11 @@ func GetTag(c appengine.Context, tag string) (*Tag, os.Error) {
 
 // Packages returns packages of the specified kind.
 // Kind must be one of "external" or "subrepo".
-func Packages(c appengine.Context, kind string) ([]*Package, os.Error) {
+func Packages(c appengine.Context, kind string) ([]*Package, error) {
 	switch kind {
 	case "external", "subrepo":
 	default:
-		return nil, os.NewError(`kind must be one of "external" or "subrepo"`)
+		return nil, errors.New(`kind must be one of "external" or "subrepo"`)
 	}
 	var pkgs []*Package
 	q := datastore.NewQuery("Package").Filter("Kind=", kind)
diff --git a/misc/dashboard/app/build/handler.go b/misc/dashboard/app/build/handler.go
index c74c54a98f4..5d1e3094cf4 100644
--- a/misc/dashboard/app/build/handler.go
+++ b/misc/dashboard/app/build/handler.go
@@ -6,10 +6,11 @@ package build
 
 import (
 	"crypto/hmac"
+	"crypto/md5"
+	"encoding/json"
+	"errors"
 	"fmt"
-	"http"
-	"json"
-	"os"
+	"net/http"
 
 	"appengine"
 	"appengine/datastore"
@@ -28,7 +29,7 @@ const commitsPerPage = 30
 // each new commit at tip.
 //
 // This handler is used by a gobuilder process in -commit mode.
-func commitHandler(r *http.Request) (interface{}, os.Error) {
+func commitHandler(r *http.Request) (interface{}, error) {
 	c := appengine.NewContext(r)
 	com := new(Commit)
 
@@ -56,7 +57,7 @@ func commitHandler(r *http.Request) (interface{}, os.Error) {
 		return nil, fmt.Errorf("validating Commit: %v", err)
 	}
 	defer cache.Tick(c)
-	tx := func(c appengine.Context) os.Error {
+	tx := func(c appengine.Context) error {
 		return addCommit(c, com)
 	}
 	return nil, datastore.RunInTransaction(c, tx, nil)
@@ -64,7 +65,7 @@ func commitHandler(r *http.Request) (interface{}, os.Error) {
 
 // addCommit adds the Commit entity to the datastore and updates the tip Tag.
 // It must be run inside a datastore transaction.
-func addCommit(c appengine.Context, com *Commit) os.Error {
+func addCommit(c appengine.Context, com *Commit) error {
 	var tc Commit // temp value so we don't clobber com
 	err := datastore.Get(c, com.Key(c), &tc)
 	if err != datastore.ErrNoSuchEntity {
@@ -94,7 +95,7 @@ func addCommit(c appengine.Context, com *Commit) os.Error {
 			return fmt.Errorf("testing for parent Commit: %v", err)
 		}
 		if n == 0 {
-			return os.NewError("parent commit not found")
+			return errors.New("parent commit not found")
 		}
 	}
 	// update the tip Tag if this is the Go repo
@@ -115,7 +116,7 @@ func addCommit(c appengine.Context, com *Commit) os.Error {
 // request body and updates the Tag entity for the Kind of tag provided.
 //
 // This handler is used by a gobuilder process in -commit mode.
-func tagHandler(r *http.Request) (interface{}, os.Error) {
+func tagHandler(r *http.Request) (interface{}, error) {
 	if r.Method != "POST" {
 		return nil, errBadMethod(r.Method)
 	}
@@ -143,7 +144,7 @@ type Todo struct {
 // todoHandler returns the next action to be performed by a builder.
 // It expects "builder" and "kind" query parameters and returns a *Todo value.
 // Multiple "kind" parameters may be specified.
-func todoHandler(r *http.Request) (interface{}, os.Error) {
+func todoHandler(r *http.Request) (interface{}, error) {
 	c := appengine.NewContext(r)
 	now := cache.Now(c)
 	key := "build-todo-" + r.Form.Encode()
@@ -151,7 +152,7 @@ func todoHandler(r *http.Request) (interface{}, os.Error) {
 	if cache.Get(r, now, key, &todo) {
 		return todo, nil
 	}
-	var err os.Error
+	var err error
 	builder := r.FormValue("builder")
 	for _, kind := range r.Form["kind"] {
 		var data interface{}
@@ -183,7 +184,7 @@ func todoHandler(r *http.Request) (interface{}, os.Error) {
 // If provided with non-empty packagePath and goHash args, it scans the first
 // 20 Commits in Num-descending order for the specified packagePath and
 // returns the first that doesn't have a Result for this builder and goHash.
-func buildTodo(c appengine.Context, builder, packagePath, goHash string) (interface{}, os.Error) {
+func buildTodo(c appengine.Context, builder, packagePath, goHash string) (interface{}, error) {
 	p, err := GetPackage(c, packagePath)
 	if err != nil {
 		return nil, err
@@ -251,7 +252,7 @@ func buildTodo(c appengine.Context, builder, packagePath, goHash string) (interf
 
 // packagesHandler returns a list of the non-Go Packages monitored
 // by the dashboard.
-func packagesHandler(r *http.Request) (interface{}, os.Error) {
+func packagesHandler(r *http.Request) (interface{}, error) {
 	kind := r.FormValue("kind")
 	c := appengine.NewContext(r)
 	now := cache.Now(c)
@@ -273,7 +274,7 @@ func packagesHandler(r *http.Request) (interface{}, os.Error) {
 // creates a new Result entity, and updates the relevant Commit entity.
 // If the Log field is not empty, resultHandler creates a new Log entity
 // and updates the LogHash field before putting the Commit entity.
-func resultHandler(r *http.Request) (interface{}, os.Error) {
+func resultHandler(r *http.Request) (interface{}, error) {
 	if r.Method != "POST" {
 		return nil, errBadMethod(r.Method)
 	}
@@ -296,7 +297,7 @@ func resultHandler(r *http.Request) (interface{}, os.Error) {
 		}
 		res.LogHash = hash
 	}
-	tx := func(c appengine.Context) os.Error {
+	tx := func(c appengine.Context) error {
 		// check Package exists
 		if _, err := GetPackage(c, res.PackagePath); err != nil {
 			return fmt.Errorf("GetPackage: %v", err)
@@ -338,7 +339,7 @@ func logHandler(w http.ResponseWriter, r *http.Request) {
 	w.Write(b)
 }
 
-type dashHandler func(*http.Request) (interface{}, os.Error)
+type dashHandler func(*http.Request) (interface{}, error)
 
 type dashResponse struct {
 	Response interface{}
@@ -349,7 +350,7 @@ type dashResponse struct {
 // the request has an unsuitable method.
 type errBadMethod string
 
-func (e errBadMethod) String() string {
+func (e errBadMethod) Error() string {
 	return "bad method: " + string(e)
 }
 
@@ -363,14 +364,14 @@ func AuthHandler(h dashHandler) http.HandlerFunc {
 		// request body when calling r.FormValue.
 		r.Form = r.URL.Query()
 
-		var err os.Error
+		var err error
 		var resp interface{}
 
 		// Validate key query parameter for POST requests only.
 		key := r.FormValue("key")
 		builder := r.FormValue("builder")
 		if r.Method == "POST" && !validKey(c, key, builder) {
-			err = os.NewError("invalid key: " + key)
+			err = errors.New("invalid key: " + key)
 		}
 
 		// Call the original HandlerFunc and return the response.
@@ -382,7 +383,7 @@ func AuthHandler(h dashHandler) http.HandlerFunc {
 		dashResp := &dashResponse{Response: resp}
 		if err != nil {
 			c.Errorf("%v", err)
-			dashResp.Error = err.String()
+			dashResp.Error = err.Error()
 		}
 		w.Header().Set("Content-Type", "application/json")
 		if err = json.NewEncoder(w).Encode(dashResp); err != nil {
@@ -394,7 +395,7 @@ func AuthHandler(h dashHandler) http.HandlerFunc {
 func keyHandler(w http.ResponseWriter, r *http.Request) {
 	builder := r.FormValue("builder")
 	if builder == "" {
-		logErr(w, r, os.NewError("must supply builder in query string"))
+		logErr(w, r, errors.New("must supply builder in query string"))
 		return
 	}
 	c := appengine.NewContext(r)
@@ -433,12 +434,12 @@ func validKey(c appengine.Context, key, builder string) bool {
 }
 
 func builderKey(c appengine.Context, builder string) string {
-	h := hmac.NewMD5([]byte(secretKey(c)))
+	h := hmac.New(md5.New, []byte(secretKey(c)))
 	h.Write([]byte(builder))
-	return fmt.Sprintf("%x", h.Sum())
+	return fmt.Sprintf("%x", h.Sum(nil))
 }
 
-func logErr(w http.ResponseWriter, r *http.Request, err os.Error) {
+func logErr(w http.ResponseWriter, r *http.Request, err error) {
 	appengine.NewContext(r).Errorf("Error: %v", err)
 	w.WriteHeader(http.StatusInternalServerError)
 	fmt.Fprint(w, "Error: ", err)
diff --git a/misc/dashboard/app/build/init.go b/misc/dashboard/app/build/init.go
index 58c5382de73..494585b0ea9 100644
--- a/misc/dashboard/app/build/init.go
+++ b/misc/dashboard/app/build/init.go
@@ -6,7 +6,7 @@ package build
 
 import (
 	"fmt"
-	"http"
+	"net/http"
 
 	"appengine"
 	"appengine/datastore"
diff --git a/misc/dashboard/app/build/key.go b/misc/dashboard/app/build/key.go
index 5306c3b6bd6..49ab236d4b7 100644
--- a/misc/dashboard/app/build/key.go
+++ b/misc/dashboard/app/build/key.go
@@ -55,7 +55,7 @@ func secretKey(c appengine.Context) string {
 			datastore.Put(c, theKey.Key(c), &theKey.BuilderKey)
 			return theKey.Secret
 		}
-		panic("cannot load builder key: " + err.String())
+		panic("cannot load builder key: " + err.Error())
 	}
 
 	return theKey.Secret
diff --git a/misc/dashboard/app/build/notify.go b/misc/dashboard/app/build/notify.go
index 826132be2a4..e02344ca82b 100644
--- a/misc/dashboard/app/build/notify.go
+++ b/misc/dashboard/app/build/notify.go
@@ -10,10 +10,9 @@ import (
 	"appengine/delay"
 	"appengine/mail"
 	"bytes"
+	"encoding/gob"
 	"fmt"
-	"gob"
-	"os"
-	"template"
+	"text/template"
 )
 
 const (
@@ -30,7 +29,7 @@ const (
 //
 // This must be run in a datastore transaction, and the provided *Commit must
 // have been retrieved from the datastore within that transaction.
-func notifyOnFailure(c appengine.Context, com *Commit, builder string) os.Error {
+func notifyOnFailure(c appengine.Context, com *Commit, builder string) error {
 	// TODO(adg): implement notifications for packages
 	if com.PackagePath != "" {
 		return nil
@@ -73,7 +72,7 @@ func notifyOnFailure(c appengine.Context, com *Commit, builder string) os.Error
 			broken = com
 		}
 	}
-	var err os.Error
+	var err error
 	if broken != nil && !broken.FailNotificationSent {
 		c.Infof("%s is broken commit; notifying", broken.Hash)
 		sendFailMailLater.Call(c, broken, builder) // add task to queue
@@ -84,7 +83,7 @@ func notifyOnFailure(c appengine.Context, com *Commit, builder string) os.Error
 }
 
 // firstMatch executes the query q and loads the first entity into v.
-func firstMatch(c appengine.Context, q *datastore.Query, v interface{}) os.Error {
+func firstMatch(c appengine.Context, q *datastore.Query, v interface{}) error {
 	t := q.Limit(1).Run(c)
 	_, err := t.Next(v)
 	if err == datastore.Done {
@@ -96,7 +95,9 @@ func firstMatch(c appengine.Context, q *datastore.Query, v interface{}) os.Error
 var (
 	sendFailMailLater = delay.Func("sendFailMail", sendFailMail)
 	sendFailMailTmpl  = template.Must(
-		template.New("notify").Funcs(tmplFuncs).ParseFile("build/notify.txt"),
+		template.New("notify.txt").
+			Funcs(template.FuncMap(tmplFuncs)).
+			ParseFiles("build/notify.txt"),
 	)
 )
 
diff --git a/misc/dashboard/app/build/test.go b/misc/dashboard/app/build/test.go
index 6f17de02bce..4114c25c526 100644
--- a/misc/dashboard/app/build/test.go
+++ b/misc/dashboard/app/build/test.go
@@ -10,15 +10,15 @@ import (
 	"appengine"
 	"appengine/datastore"
 	"bytes"
+	"encoding/json"
+	"errors"
 	"fmt"
-	"http"
-	"http/httptest"
 	"io"
-	"json"
-	"os"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
 	"strings"
 	"time"
-	"url"
 )
 
 func init() {
@@ -41,14 +41,14 @@ var testPackages = []*Package{
 	testPackage,
 }
 
-var tCommitTime = time.Seconds() - 60*60*24*7
+var tCommitTime = time.Now().Add(-time.Hour * 24 * 7)
 
 func tCommit(hash, parentHash string) *Commit {
-	tCommitTime += 60 * 60 * 12 // each commit should have a different time
+	tCommitTime.Add(time.Hour) // each commit should have a different time
 	return &Commit{
 		Hash:       hash,
 		ParentHash: parentHash,
-		Time:       datastore.Time(tCommitTime * 1e6),
+		Time:       tCommitTime,
 		User:       "adg",
 		Desc:       "change description",
 	}
@@ -233,9 +233,9 @@ func testHandler(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, "PASS")
 }
 
-func nukeEntities(c appengine.Context, kinds []string) os.Error {
+func nukeEntities(c appengine.Context, kinds []string) error {
 	if !appengine.IsDevAppServer() {
-		return os.NewError("can't nuke production data")
+		return errors.New("can't nuke production data")
 	}
 	var keys []*datastore.Key
 	for _, kind := range kinds {
diff --git a/misc/dashboard/app/build/ui.go b/misc/dashboard/app/build/ui.go
index 05bccdc294e..0337aa3063d 100644
--- a/misc/dashboard/app/build/ui.go
+++ b/misc/dashboard/app/build/ui.go
@@ -9,14 +9,13 @@ package build
 
 import (
 	"bytes"
-	"exp/template/html"
-	"http"
-	"os"
+	"errors"
+	"html/template"
+	"net/http"
 	"regexp"
 	"sort"
 	"strconv"
 	"strings"
-	"template"
 
 	"appengine"
 	"appengine/datastore"
@@ -25,7 +24,6 @@ import (
 
 func init() {
 	http.HandleFunc("/", uiHandler)
-	html.Escape(uiTemplate)
 }
 
 // uiHandler draws the build status page.
@@ -96,7 +94,7 @@ type Pagination struct {
 
 // goCommits gets a slice of the latest Commits to the Go repository.
 // If page > 0 it paginates by commitsPerPage.
-func goCommits(c appengine.Context, page int) ([]*Commit, os.Error) {
+func goCommits(c appengine.Context, page int) ([]*Commit, error) {
 	q := datastore.NewQuery("Commit").
 		Ancestor((&Package{}).Key(c)).
 		Order("-Time").
@@ -140,7 +138,7 @@ type PackageState struct {
 }
 
 // TagStateByName fetches the results for all Go subrepos at the specified Tag.
-func TagStateByName(c appengine.Context, name string) (*TagState, os.Error) {
+func TagStateByName(c appengine.Context, name string) (*TagState, error) {
 	tag, err := GetTag(c, name)
 	if err != nil {
 		return nil, err
@@ -173,7 +171,7 @@ type uiTemplateData struct {
 }
 
 var uiTemplate = template.Must(
-	template.New("ui").Funcs(tmplFuncs).ParseFile("build/ui.html"),
+	template.New("ui.html").Funcs(tmplFuncs).ParseFiles("build/ui.html"),
 )
 
 var tmplFuncs = template.FuncMap{
@@ -293,13 +291,13 @@ func shortUser(user string) string {
 var repoRe = regexp.MustCompile(`^code\.google\.com/p/([a-z0-9\-]+)(\.[a-z0-9\-]+)?$`)
 
 // repoURL returns the URL of a change at a Google Code repository or subrepo.
-func repoURL(hash, packagePath string) (string, os.Error) {
+func repoURL(hash, packagePath string) (string, error) {
 	if packagePath == "" {
 		return "https://code.google.com/p/go/source/detail?r=" + hash, nil
 	}
 	m := repoRe.FindStringSubmatch(packagePath)
 	if m == nil {
-		return "", os.NewError("unrecognized package: " + packagePath)
+		return "", errors.New("unrecognized package: " + packagePath)
 	}
 	url := "https://code.google.com/p/" + m[1] + "/source/detail?r=" + hash
 	if len(m) > 2 {
diff --git a/misc/dashboard/app/cache/cache.go b/misc/dashboard/app/cache/cache.go
index d290ed416cc..8bd3020f3c8 100644
--- a/misc/dashboard/app/cache/cache.go
+++ b/misc/dashboard/app/cache/cache.go
@@ -6,7 +6,7 @@ package cache
 
 import (
 	"fmt"
-	"http"
+	"net/http"
 	"time"
 
 	"appengine"
@@ -19,7 +19,7 @@ const (
 	expiry  = 600 // 10 minutes
 )
 
-func newTime() uint64 { return uint64(time.Seconds()) << 32 }
+func newTime() uint64 { return uint64(time.Now().Unix()) << 32 }
 
 // Now returns the current logical datastore time to use for cache lookups.
 func Now(c appengine.Context) uint64 {