Index: branches/unlabeled/unlabeled-1.69.2/core/units/general/cat_event_handler.php
===================================================================
diff -u -r7754 -r7922
--- branches/unlabeled/unlabeled-1.69.2/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 7754)
+++ branches/unlabeled/unlabeled-1.69.2/core/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 7922)
@@ -58,26 +58,31 @@
 				$selected_ids = implode(',', $this->getSelectedIDs($event, true));
 			}
 
-			$id_field = $this->Application->getUnitOption($event->Prefix, 'IDField');
-			$table_name = $this->Application->getUnitOption($event->Prefix, 'TableName');
-			$sql = 'SELECT '.$id_field.', CreatedById, ci.CategoryId
-					FROM '.$table_name.' item_table
-					LEFT JOIN '.$this->Application->getUnitOption('ci', 'TableName').' ci ON ci.ItemResourceId = item_table.ResourceId
-					WHERE '.$id_field.' IN ('.$selected_ids.') AND (ci.PrimaryCat = 1)';
-			$items = $this->Conn->Query($sql, $id_field);
-
 			$perm_value = true;
-			$perm_helper =& $this->Application->recallObject('PermissionsHelper');
-			foreach ($items as $item_id => $item_data) {
-				if ($perm_helper->ModifyCheckPermission($item_data['CreatedById'], $item_data['CategoryId'], $event->Prefix) == 0) {
-					// one of items selected has no permission
-					$perm_value = false;
-					break;
+			if (strlen($selected_ids)) {
+				$id_field = $this->Application->getUnitOption($event->Prefix, 'IDField');
+				$table_name = $this->Application->getUnitOption($event->Prefix, 'TableName');
+				$sql = 'SELECT '.$id_field.', CreatedById, ci.CategoryId
+						FROM '.$table_name.' item_table
+						LEFT JOIN '.$this->Application->getUnitOption('ci', 'TableName').' ci ON ci.ItemResourceId = item_table.ResourceId
+						WHERE '.$id_field.' IN ('.$selected_ids.') AND (ci.PrimaryCat = 1)';
+				$items = $this->Conn->Query($sql, $id_field);
+				
+				$perm_helper =& $this->Application->recallObject('PermissionsHelper');
+				foreach ($items as $item_id => $item_data) {
+					if ($perm_helper->ModifyCheckPermission($item_data['CreatedById'], $item_data['CategoryId'], $event->Prefix) == 0) {
+						// one of items selected has no permission
+						$perm_value = false;
+						break;
+					}
 				}
+	
+				if (!$perm_value) {
+					$event->status = erPERM_FAIL;
+				}
 			}
-
-			if (!$perm_value) {
-				$event->status = erPERM_FAIL;
+			else {
+				trigger_error('IDs not passed to '.$event->getPrefixSpecial().':CheckPermission', E_USER_WARNING);
 			}
 
 			return $perm_value;