diff --git a/umbraco/cms/helpers/Casing.cs b/umbraco/cms/helpers/Casing.cs
index 5e3dfac8cc..05b9044504 100644
--- a/umbraco/cms/helpers/Casing.cs
+++ b/umbraco/cms/helpers/Casing.cs
@@ -7,7 +7,8 @@ namespace umbraco.cms.helpers
 {
     public class Casing
     {
-        public const string VALID_ALIAS_CHARACTERS = "_-abcdefghijklmnopqrstuvwxyz";
+        public const string VALID_ALIAS_CHARACTERS = "_-abcdefghijklmnopqrstuvwxyz1234567890";
+        public const string INVALID_FIRST_CHARACTERS = "01234567890";
 
         /// <summary>
         /// A helper method to ensure that an Alias string doesn't contains any illegal characters
@@ -26,10 +27,17 @@ namespace umbraco.cms.helpers
                 if (VALID_ALIAS_CHARACTERS.Contains(currentChar.ToLower()))
                 {
                     // check for camel (if previous character is a space, we'll upper case the current one
-                    if (i < aliasLength - 1 && i > 0 && alias.Substring(i - 1, 1) == " ")
-                        currentChar = currentChar.ToUpper();
+                    if (i == 0 && INVALID_FIRST_CHARACTERS.Contains(currentChar.ToLower()))
+                    {
+                        currentChar = "";
+                    }
+                    else
+                    {
+                        if (i < aliasLength - 1 && i > 0 && alias.Substring(i - 1, 1) == " ")
+                            currentChar = currentChar.ToUpper();
 
-                    safeString.Append(currentChar);
+                        safeString.Append(currentChar);
+                    }
                 }
             }
 
diff --git a/umbraco/presentation/umbraco/controls/ContentTypeControlNew.ascx b/umbraco/presentation/umbraco/controls/ContentTypeControlNew.ascx
index d880f1504c..1b5f3a5d87 100644
--- a/umbraco/presentation/umbraco/controls/ContentTypeControlNew.ascx
+++ b/umbraco/presentation/umbraco/controls/ContentTypeControlNew.ascx
@@ -94,4 +94,5 @@
 
 <script type="text/javascript">
     duplicatePropertyNameAsSafeAlias('ctl00_body_ContentTypeControlNew1_GenericPropertyNew_control_tbName', 'ctl00_body_ContentTypeControlNew1_GenericPropertyNew_control_tbAlias');
+    checkAlias('ctl00_body_ContentTypeControlNew1_txtAlias');
 </script>
\ No newline at end of file
diff --git a/umbraco/presentation/umbraco/js/UmbracoCasingRules.aspx.cs b/umbraco/presentation/umbraco/js/UmbracoCasingRules.aspx.cs
index 416309f982..304fd73eb1 100644
--- a/umbraco/presentation/umbraco/js/UmbracoCasingRules.aspx.cs
+++ b/umbraco/presentation/umbraco/js/UmbracoCasingRules.aspx.cs
@@ -16,7 +16,8 @@ namespace umbraco.presentation.js
             Response.Write(String.Format(@"
 var UMBRACO_FORCE_SAFE_ALIAS = {0};
 var UMBRACO_FORCE_SAFE_ALIAS_VALIDCHARS = '{1}';
-", UmbracoSettings.ForceSafeAliases.ToString().ToLower(), Casing.VALID_ALIAS_CHARACTERS));
+var UMBRACO_FORCE_SAFE_ALIAS_INVALID_FIRST_CHARS = '{2}';
+", UmbracoSettings.ForceSafeAliases.ToString().ToLower(), Casing.VALID_ALIAS_CHARACTERS, Casing.INVALID_FIRST_CHARACTERS));
 
         }
 
diff --git a/umbraco/presentation/umbraco_client/GenericProperty/genericProperty.js b/umbraco/presentation/umbraco_client/GenericProperty/genericProperty.js
index 4dde1a590a..f54b120e30 100644
--- a/umbraco/presentation/umbraco_client/GenericProperty/genericProperty.js
+++ b/umbraco/presentation/umbraco_client/GenericProperty/genericProperty.js
@@ -41,10 +41,14 @@ function safeAlias(alias) {
             currentChar = alias.substring(i, i + 1);
             if (UMBRACO_FORCE_SAFE_ALIAS_VALIDCHARS.indexOf(currentChar.toLowerCase()) > -1) {
                 // check for camel (if previous character is a space, we'll upper case the current one
-                if (i < aliasLength - 1 && i > 0 && alias.substring(i - 1, i) == ' ')
-                    currentChar = currentChar.toUpperCase();
+                if (i == 0 && UMBRACO_FORCE_SAFE_ALIAS_INVALID_FIRST_CHARS.indexOf(currentChar.toLowerCase()) > 0) { 
+                    currentChar = '';
+                } else {
+                    if (i < aliasLength - 1 && i > 0 && alias.substring(i - 1, i) == ' ')
+                        currentChar = currentChar.toUpperCase();
 
-                safeAlias += currentChar;
+                    safeAlias += currentChar;
+                }
             }
         }