http://bugtracker.ispconfig.org/index.php?do=details&task_id=1348&project=3

I've changed the id HTML attributes of the check boxes. You can still group post requests on name attributes while using the id to keep the items unique in the DOM tree. i saw some commented code already being there but wasn't functioning, so i rewrote the original lines.
This only goes for type: CHECKBOXARRAY and RADIO