I think I know what happened. There is a new box up at the upper right of the screen that allows you to start a new thread in any forum by picking it. That particular forum is not listed. I've got a feeling when they revamped things it was decided to roll that forum into a new one, probably "suggestions". In any case, that particular forum is not listed in the box. In addition the forum says there are 42 threads, of which about 7 can be seen. My bet is you have a programming bug, or an incomplete migration there.

Are you looking for QA people by any chance? (just kidding)