reverse merge from 1.6.0 (r10044)

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@10695 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/db/DB.class.php

@@ -428,6 +428,7 @@
             // execute appropriate query
             switch($output->getAction()) {
                 case 'insert' :
+                case 'insert-select' :
                         $this->resetCountCache($output->tables);
                         $output = $this->_executeInsertAct($output);
                     break;