diff --git a/src/Umbraco.Core/Strings/CleanStringType.cs b/src/Umbraco.Core/Strings/CleanStringType.cs
index f681c42d4a..4c53be4cb8 100644
--- a/src/Umbraco.Core/Strings/CleanStringType.cs
+++ b/src/Umbraco.Core/Strings/CleanStringType.cs
@@ -14,25 +14,6 @@ namespace Umbraco.Core.Strings
         // note: you have 32 bits at your disposal
         // 0xffffffff
 
-
-        // masks
-
-        /// <summary>
-        /// Flag mask for casing.
-        /// </summary>
-        CaseMask = 0x3f, // 0xff - 8 possible values
-
-        /// <summary>
-        /// Flag mask for encoding.
-        /// </summary>
-        CodeMask = 0x700, // 0xff00 - 8 possible values
-
-        /// <summary>
-        /// Flag mask for role.
-        /// </summary>
-        RoleMask = 0x070000, // 0xff0000 - 8 possible values
-
-
         // no value
 
         /// <summary>
@@ -43,6 +24,11 @@ namespace Umbraco.Core.Strings
 
         // casing values
 
+        /// <summary>
+        /// Flag mask for casing.
+        /// </summary>
+        CaseMask = PascalCase | CamelCase | Unchanged | LowerCase | UpperCase | UmbracoCase,
+
         /// <summary>
         /// Pascal casing eg "PascalCase".
         /// </summary>
@@ -78,6 +64,11 @@ namespace Umbraco.Core.Strings
 
         // encoding values
 
+        /// <summary>
+        /// Flag mask for encoding.
+        /// </summary>
+        CodeMask = Unicode | Utf8 | Ascii,
+
         /// <summary>
         /// Unicode encoding.
         /// </summary>
@@ -97,6 +88,11 @@ namespace Umbraco.Core.Strings
 
         // role values
 
+        /// <summary>
+        /// Flag mask for role.
+        /// </summary>
+        RoleMask = UrlSegment | Alias | FileName | ConvertCase,
+
         /// <summary>
         ///  Url role.
         /// </summary>
@@ -110,6 +106,11 @@ namespace Umbraco.Core.Strings
         /// <summary>
         /// FileName role.
         /// </summary>
-        FileName = 0x040000
+        FileName = 0x040000,
+
+        /// <summary>
+        /// ConvertCase role.
+        /// </summary>
+        ConvertCase = 0x080000
     }
 }
diff --git a/src/Umbraco.Core/Strings/DefaultShortStringHelper.cs b/src/Umbraco.Core/Strings/DefaultShortStringHelper.cs
index fbbc25ea20..07f262c272 100644
--- a/src/Umbraco.Core/Strings/DefaultShortStringHelper.cs
+++ b/src/Umbraco.Core/Strings/DefaultShortStringHelper.cs
@@ -1,9 +1,20 @@
-using System;
+
+// debugging
+// define WRTCONS to write cleaning details & steps to console
+// leave it wrapped within #if DEBUG to make sure it does leak
+// into RELEASE, see http://issues.umbraco.org/issue/U4-4199
+#if DEBUG
+#undef WRTCONS
+#endif
+
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Globalization;
+using System.Text;
+using System.Text.RegularExpressions;
 using Umbraco.Core.Configuration;
 
 namespace Umbraco.Core.Strings
@@ -176,6 +187,12 @@ namespace Umbraco.Core.Strings
                     : (char.IsLetterOrDigit(c) || c == '_'), // letter, digit or underscore
                 StringType = CleanStringType.Ascii | CleanStringType.UmbracoCase,
                 BreakTermsOnUpper = false
+            }).WithConfig(CleanStringType.ConvertCase, new Config
+            {
+                PreFilter = null,
+                IsTerm = (c, leading) => char.IsLetterOrDigit(c) || c == '_', // letter, digit or underscore
+                StringType = CleanStringType.Ascii,
+                BreakTermsOnUpper = true
             });
         }
 
@@ -503,6 +520,10 @@ function validateSafeAlias(id, value, immediate, callback) {{
             if (culture == null)
                 throw new ArgumentNullException("culture");
 
+#if WRTCONS
+            Console.WriteLine("STRING TYPE {0}", stringType);
+#endif
+
             // get config
             var config = GetConfig(stringType, culture);
             stringType = config.StringTypeExtend(stringType);
@@ -570,6 +591,9 @@ function validateSafeAlias(id, value, immediate, callback) {{
             var state = StateBreak;
 
             caseType &= CleanStringType.CaseMask;
+#if WRTCONS
+            Console.WriteLine("CASE {0}", caseType);
+#endif
 
             // if we apply global ToUpper or ToLower to text here
             // then we cannot break words on uppercase chars
@@ -595,13 +619,13 @@ function validateSafeAlias(id, value, immediate, callback) {{
                 var isPair = char.IsSurrogate(c);
                 if (isPair)
                     throw new NotSupportedException("Surrogate pairs are not supported.");
-
-                //Console.WriteLine("CHAR '{0}' {1} {2} - {3} - {4}/{5} {6}", 
-                //    c,
-                //    isTerm ? "term" : "!term", isUpper ? "upper" : "!upper", 
-                //    state,
-                //    i, ipos, leading ? "leading" : "!leading");
-
+#if WRTCONS
+                Console.WriteLine("CHAR '{0}' {1} {2} - {3} - {4}/{5} {6}",
+                    c,
+                    isTerm ? "term" : "!term", isUpper ? "upper" : "!upper",
+                    state,
+                    i, ipos, leading ? "leading" : "!leading");
+#endif
                 switch (state)
                 {
                     // within a break
@@ -708,11 +732,12 @@ function validateSafeAlias(id, value, immediate, callback) {{
             CleanStringType caseType, CultureInfo culture, bool isAcronym)
         {
             var term = input.Substring(ipos, len);
-            //Console.WriteLine("TERM \"{0}\" {1} {2}",
-            //    term,
-            //    isAcronym ? "acronym" : "word",
-            //    caseType);
-
+#if WRTCONS
+            Console.WriteLine("TERM \"{0}\" {1} {2}",
+                term,
+                isAcronym ? "acronym" : "word",
+                caseType);
+#endif
             if (isAcronym)
             {
                 if ((caseType == CleanStringType.CamelCase && len <= 2 && opos > 0) ||