diff --git a/modules/auth/auth.go b/modules/auth/auth.go
index e493faefe..85df42d8c 100644
--- a/modules/auth/auth.go
+++ b/modules/auth/auth.go
@@ -21,7 +21,7 @@ type Form interface {
 }
 
 type RegisterForm struct {
-	UserName     string `form:"username" binding:"Required;AlphaDash;MaxSize(30)"`
+	UserName     string `form:"username" binding:"Required;AlphaDashDot;MaxSize(30)"`
 	Email        string `form:"email" binding:"Required;Email;MaxSize(50)"`
 	Password     string `form:"passwd" binding:"Required;MinSize(6);MaxSize(30)"`
 	RetypePasswd string `form:"retypepasswd"`
@@ -123,6 +123,8 @@ func validate(errors *base.BindingErrors, data base.TmplData, form Form) {
 				data["ErrorMsg"] = form.Name(field.Name) + " cannot be empty"
 			case base.BindingAlphaDashError:
 				data["ErrorMsg"] = form.Name(field.Name) + " must be valid alpha or numeric or dash(-_) characters"
+			case base.BindingAlphaDashDotError:
+				data["ErrorMsg"] = form.Name(field.Name) + " must be valid alpha or numeric or dash(-_) or dot characters"
 			case base.BindingMinSizeError:
 				data["ErrorMsg"] = form.Name(field.Name) + " must contain at least " + getMinMaxSize(field) + " characters"
 			case base.BindingMaxSizeError:
diff --git a/modules/base/base.go b/modules/base/base.go
index 3e80a436e..e6befb83f 100644
--- a/modules/base/base.go
+++ b/modules/base/base.go
@@ -45,6 +45,7 @@ func (this *BindingErrors) Combine(other BindingErrors) {
 const (
 	BindingRequireError         string = "Required"
 	BindingAlphaDashError       string = "AlphaDash"
+	BindingAlphaDashDotError    string = "AlphaDashDot"
 	BindingMinSizeError         string = "MinSize"
 	BindingMaxSizeError         string = "MaxSize"
 	BindingEmailError           string = "Email"
diff --git a/modules/middleware/binding.go b/modules/middleware/binding.go
index cde9ae9cc..bff34ddde 100644
--- a/modules/middleware/binding.go
+++ b/modules/middleware/binding.go
@@ -180,9 +180,10 @@ func Validate(obj interface{}) martini.Handler {
 }
 
 var (
-	alphaDashPattern = regexp.MustCompile("[^\\d\\w-_]")
-	emailPattern     = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
-	urlPattern       = regexp.MustCompile(`(http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?`)
+	alphaDashPattern    = regexp.MustCompile("[^\\d\\w-_]")
+	alphaDashDotPattern = regexp.MustCompile("[^\\d\\w-_\\.]")
+	emailPattern        = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
+	urlPattern          = regexp.MustCompile(`(http|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?`)
 )
 
 func validateStruct(errors *base.BindingErrors, obj interface{}) {
@@ -227,6 +228,11 @@ func validateStruct(errors *base.BindingErrors, obj interface{}) {
 					errors.Fields[field.Name] = base.BindingAlphaDashError
 					break
 				}
+			case rule == "AlphaDashDot":
+				if alphaDashDotPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
+					errors.Fields[field.Name] = base.BindingAlphaDashDotError
+					break
+				}
 			case strings.HasPrefix(rule, "MinSize("):
 				min, err := strconv.Atoi(rule[8 : len(rule)-1])
 				if err != nil {
diff --git a/templates/base/navbar.tmpl b/templates/base/navbar.tmpl
index da6865b8e..80085d974 100644
--- a/templates/base/navbar.tmpl
+++ b/templates/base/navbar.tmpl
@@ -3,7 +3,7 @@
         <nav class="nav">
             <a id="nav-logo" class="nav-item pull-left{{if .PageIsHome}} active{{end}}" href="/"><img src="/img/favicon.png" alt="Gogs Logo" id="logo"></a>
             <a class="nav-item pull-left{{if .PageIsUserDashboard}} active{{end}}" href="/">Dashboard</a>
-            <a class="nav-item pull-left{{if .PageIsHelp}} active{{end}}" target="_blank" href="https://github.com/gogits/gogs/wiki">Help</a>{{if .IsSigned}}
+            <a class="nav-item pull-left{{if .PageIsHelp}} active{{end}}" target="_blank" href="http://gogs.io/docs">Help</a>{{if .IsSigned}}
             {{if .HasAccess}}<form class="nav-item pull-left{{if .PageIsNewRepo}} active{{end}}" id="nav-search-form">
                 <div class="input-group">
                     <div class="input-group-btn">