Well, I figured mine out. Turns out that my bbpress will not run with my AWPC classified plug in, which is essential to my site. It all worked fine together before the update, so I have to rebuild one or the other I guess. I will probably be looking for a new forum plugin.
I am having the same problem, I updated to WP 3.8 and my forums will not work at all, I have no Forum tab on my dashboard, I have un-installed and re-installed several times, I have even manually installed it. I am lost here, I can see my old forum topics, but I cannot do anything with them and I cannot add new topics or anything.
