As far as I'm aware (from searching these boards), the feature that allows users of a specified group on phpBB to login to the update.php page doesn't actually work.
However, I can't see why updates would have been made to a feature that doesn't work.
So, I'm a little confused as to whether it does or doesn't work (myself, I'm just getting an invalid user message even though the group ID's are correct).
Thanks in advance.