Index: branches/RC/core/units/general/cat_event_handler.php
===================================================================
diff -u -r10080 -r10098
--- branches/RC/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 10080)
+++ branches/RC/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 10098)
@@ -1406,7 +1406,7 @@
 			case 'text':
 				$keywords[$field] = unhtmlentities( $keywords[$field] );
 
-				if (strlen($keywords[$field]) >= $this->Application->ConfigValue('Search_MinKeyword_Length')) {
+				if (mb_strlen($keywords[$field]) >= $this->Application->ConfigValue('Search_MinKeyword_Length')) {
 					$highlight_keywords[] = $keywords[$field];
 					if (in_array($verbs[$field], Array('any', 'contains', 'notcontains'))) {
 						$keywords[$field] = '%'.strtr($keywords[$field], Array('%' => '\\%', '_' => '\\_')).'%';