Index: branches/5.1.x/core/install.php
===================================================================
diff -u -N -r14360 -r14395
--- branches/5.1.x/core/install.php	(.../install.php)	(revision 14360)
+++ branches/5.1.x/core/install.php	(.../install.php)	(revision 14395)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install.php 14360 2011-06-01 07:50:46Z alex $
+* @version	$Id: install.php 14395 2011-06-28 13:59:28Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1074,7 +1074,7 @@
 
 					// don't upgrade same version twice
 					$start_pos = $match[0][1] + strlen($match[0][0]);
-					$end_pos = array_key_exists($index + 1, $matches) ? $matches[$index + 1][0][1] : mb_strlen($sqls);
+					$end_pos = array_key_exists($index + 1, $matches) ? $matches[$index + 1][0][1] : strlen($sqls);
 					$version_sqls = substr($sqls, $start_pos, $end_pos - $start_pos);
 
 					if ($start_from_query == 0) {