Hi there,
We have found a bug in room-edit.tcl that gives read and write permissions on chat to all registered users when editing a room.
we have uploaded the corrected version to HEAD (it was just a missing "s") and will upload an update script soon.
fortunately all the users involved couldn't access to the chat rooms because it still is community protected, but it could lead to other problems. We found it when changing the way we get the available rooms in the chat-portlet.