[@_ck_ Participant 16 years, 9 months ago]

I vaguely remember this as a bug and thought it had been solved in 0.9

When you go into some of the forums do you see any sub-forums?

If you have a topic in one of the forums, at the bottom it will give you a potential list of forums for you to move the topic to. Do the other forums that disappeared show up in that list?