Better fix

htdocs/core/class/html.form.class.php

@@ -1437,7 +1437,7 @@ class Form
         	{
         		$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."usergroup_user as ug";
         		$sql.= " ON ug.fk_user = u.rowid";
-        		$sql.= " AND ug.entity = ".$conf->entity;
+        		$sql.= " WHERE ug.entity = ".$conf->entity;
         	}
         	else
         	{