As I always say and never happens, bug me if you notice something broken. Yes, that even includes the message board. Go ahead and try to make one yourself, if you dare. This means that a thread with 400 posts will show all 400 posts every time you load it. Deleting a thread does not properly update post counts, both on the forum posts counter and the personal posts counter.
Signatures are mostly implemented, personal pictures are a little bit further down the road.
Owners can assign other users to administrators but it has no effect. I need to figure out what to do with HTML on a forum. I have not yet glossed over the user system, which should be actually integrated into the site instead of whatever it is now. However, all is not bad. The message board is mostly functional as of right now, with the main bulk of the system done, including the ability for anyone who's got a user to create their own.