Index: trunk/core/units/general/cat_event_handler.php
===================================================================
diff -u -N -r8779 -r8786
--- trunk/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 8779)
+++ trunk/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 8786)
@@ -242,13 +242,14 @@
 			}
 			$search_event = $event_mapping[$type];
 			$this->$search_event($event);
+
 			$search_table = TABLE_PREFIX.'ses_'.$this->Application->GetSID().'_'.TABLE_PREFIX.'Search';
 			$sql = 'SHOW TABLES LIKE "'.$search_table.'"';
-			if ( $this->Conn->Query($sql) ) {
+			if ($this->Conn->Query($sql)) {
 				$search_res_ids = $this->Conn->GetCol('SELECT ResourceId FROM '.$search_table);
 			}
 
-			if ($search_res_ids) {
+			if (isset($search_res_ids) && $search_res_ids) {
 				$type_clauses['search']['include'] = '%1$s.ResourceId IN ('.implode(',', $search_res_ids).') AND PrimaryCat = 1';
 				$type_clauses['search']['except'] = '%1$s.ResourceId NOT IN ('.implode(',', $search_res_ids).') AND PrimaryCat = 1';
 			}