--- AliasHandler.php.original   2014-08-26 11:13:38.000000000 +0800
+++ AliasHandler.php    2014-08-26 11:05:09.000000000 +0800
@@ -279,7 +279,7 @@
 
     public function getList($condition, $limit=-1, $offset=-1) {
         # only list aliases that do not belong to mailboxes
-       return parent::getList( "__is_mailbox IS NULL AND ( $condition )", $limit, $offset);
+       return parent::getList( "__mailbox_username IS NULL AND ( $condition )", $limit, $offset);
     }
 
     protected function _validate_goto($field, $val) {
		
     }