Index: branches/RC/core/kernel/event_handler.php
===================================================================
diff -u -N -r8929 -r10098
--- branches/RC/core/kernel/event_handler.php	(.../event_handler.php)	(revision 8929)
+++ branches/RC/core/kernel/event_handler.php	(.../event_handler.php)	(revision 10098)
@@ -221,7 +221,7 @@
 					$ret .= $processed_params[$prefix_special.'_Page'].'/';
 				}
 			}
-			
+
 			if ($processed_params[$prefix_special.'_id']) {
 
 				// this allows to fill 3 cache records with one query (see this method for details)
@@ -247,7 +247,7 @@
 			}
 
 			$event->setEventParam('url_params', $url_params);
-			$event->setEventParam('env_string', strtolower($ret) );
+			$event->setEventParam('env_string', mb_strtolower($ret) );
 		}
 
 		/**