Index: branches/RC/kernel/units/images/image_event_handler.php
===================================================================
diff -u -N -r8929 -r10098
--- branches/RC/kernel/units/images/image_event_handler.php	(.../image_event_handler.php)	(revision 8929)
+++ branches/RC/kernel/units/images/image_event_handler.php	(.../image_event_handler.php)	(revision 10098)
@@ -27,10 +27,10 @@
 			// ListImages aggregated tag uses this special
 			return '';
 		}
-		
+
 		return parent::getMainSpecial($event);
 	}
-		
+
 	function customProcessing(&$event, $type)
 	{
 		$object =& $event->GetObject();
@@ -149,7 +149,7 @@
 	{
 		$parts = pathinfo($name);
 		$ext = '.'.$parts['extension'];
-		$filename = substr($parts['basename'], 0, -strlen($ext));
+		$filename = mb_substr($parts['basename'], 0, -mb_strlen($ext));
 		$new_name = $filename.$ext;
 		while ( file_exists($path.'/'.$new_name) )
 		{