Can't reply to any posts and my forum profile link at top right is gone

That sums it up. Hopefully I can at least post this thread.

EDIT: Yep, posted. Back to description: I can type things into reply boxes, but when I click "post", nothing happens. The post button disappears for a moment, but then the reappears, and nothing is posted. The text box is still there, with everything I typed. Nothing changes. And I can't view my post history either, as stated. Anyone run across this before?

EDIT2: Oh, and also the warning and reply links next to "My Account" on the top right have disappeared, too.