Index: branches/5.1.x/core/kernel/utility/multibyte.php
===================================================================
diff -u -N -r14241 -r14537
--- branches/5.1.x/core/kernel/utility/multibyte.php	(.../multibyte.php)	(revision 14241)
+++ branches/5.1.x/core/kernel/utility/multibyte.php	(.../multibyte.php)	(revision 14537)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: multibyte.php 14241 2011-03-16 20:24:35Z alex $
+* @version	$Id: multibyte.php 14537 2011-09-18 14:19:48Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -67,4 +67,20 @@
 			return strlen($str);
 		}
 
+		function mb_convert_case ($str, $mode = MB_CASE_UPPER, $encoding = null)
+		{
+			if ( $mode == MB_CASE_UPPER ) {
+				return strtoupper($str);
+			}
+			elseif ( $mode == MB_CASE_LOWER ) {
+				return strtolower($str);
+			}
+
+			// $mode == MB_CASE_TITLE
+			$words = explode(' ', $str);
+			$words = array_map('strtolower', $words);
+			$words = array_map('ucfirst', $words);
+
+			return implode(' ', $words);
+		}
 	}
\ No newline at end of file