The only option under Maintenance similar to your comment is "Rebuild Forum Stat Files".

I ran that, it makes no difference. Perhaps this is a change to UBB V6 - I can go to the forum directly, but since it is "off" in my control panel, I can't post to it (because it is "inactive").

So the quesion remains, how do you make an active forum (whether or not its private) NOT show up on the forums main page (list of forums)??????

Here is the exact message given when "New Topic" is selected (and I am logged on as an administrator):

"This forum is now inactive. You may not post to this forum. "