Index: branches/RC/core/units/general/helpers/permissions_helper.php
===================================================================
diff -u -N -r11610 -r11662
--- branches/RC/core/units/general/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 11610)
+++ branches/RC/core/units/general/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 11662)
@@ -198,7 +198,7 @@
 			}
 			else {
 				$new_item = $this->Application->IsAdmin() && $event_handler->isNewItemCreate($event) ? true : false;
-				$check_status = $this->checkCombinedPermissions($event, $owner_id, $category_id, $new_item);
+				$check_status = $this->checkCombinedPermissions($event, $owner_id, (int)$category_id, $new_item);
 			}
 
 			if (isset($check_status)) {
@@ -222,7 +222,7 @@
 					continue;
 				}
 				$perm_name = $item_prefix.'.'.$perm_mapping[$perm_name];
-				$perm_status = $this->CheckPermission($perm_name, 0, $category_id);
+				$perm_status = $this->CheckPermission($perm_name, 0, (int)$category_id);
 
 				if ($perm_status) {
 					return $perm_status;