I found bug in deleting groups from admin (0.8.2).
Function 'DeleteGroupByID()' from 'lib/classes/class.group.inc.php' don't remove group-related records in tables 'group_perms' and user_groups' - so function 'check_permission()' can not work properly. With this bug - I can add some permission to any group, then add any user to this group, then remove this group - and problem is: this user still have a permission of non-existed group and there is no chance fix it from admin interface, only directly in database.
Cheers, 100rk.
