I believe that I just restored the threads and posts from the Legacy forums that went mysteriously missing when we moved the forums to the new server with the launch of World 8. The method for doing so is somewhat heavy-handed, though, and I'm not entirely sure it meshes with how phpBB wants data to be handled, so please tell me if you find any forum oddities that may have been caused by it. Also please do so rather quickly, because the only thing I can really do in case I've broken something important is to restore from a backup taken right before the restoration, meaning everything posted thereafter will be lost.
Otherwise, please enjoy the old posts being back!
In case anyone asks: No, I've still no clue why they went lost in the first place.