I received notification that there had been a reply to a post I'd made in the "How To" section. ( http://forums.debian.net/viewtopic.php?f=16&t=70647 ). When I clicked on the link for viewing the reply, ( http://forums.debian.net/viewtopic.php?f=16&t=70647&p=398055&e=398055 ) and then logged in, I saw a page telling me I wasn't authorized to view that forum board.
Weird.