Index: trunk/core/kernel/event_handler.php
===================================================================
diff -u -r3834 -r3872
--- trunk/core/kernel/event_handler.php	(.../event_handler.php)	(revision 3834)
+++ trunk/core/kernel/event_handler.php	(.../event_handler.php)	(revision 3872)
@@ -156,9 +156,15 @@
 			
 			$event_key = array_search('event', $query_vars);
 			if ($event_key) {
+				// pass through event of this prefix
 				unset($query_vars[$event_key]);
 			}
 			
+			if (!getArrayValue($url_params, $prefix_special.'_event')) {
+				// if empty event, then remove it from url
+				unset( $url_params[$prefix_special.'_event'] );
+			}
+			
 			//if pass events is off and event is not implicity passed
 			if ( !$pass_events && !isset($url_params[$prefix_special.'_event']) )
 			{