Index: trunk/xpressme_integration_kit/wp-content/plugins/xpressme/include/custom_functions.php
===================================================================
--- trunk/xpressme_integration_kit/wp-content/plugins/xpressme/include/custom_functions.php	(revision 670)
+++ trunk/xpressme_integration_kit/wp-content/plugins/xpressme/include/custom_functions.php	(revision 680)
@@ -477,5 +477,5 @@
 function xpress_substr($str, $start, $length, $trimmarker = '...')
 {
-    if (function_exists('mb_substr')){
+    if (function_exists('mb_substr') && function_exists('mb_strlen')){
         $str2 = mb_substr( $str , $start , $length);
         return $str2 . ( mb_strlen($str)!=mb_strlen($str2) ? $trimmarker : '' );