Can't get new favorites via the 'Keep' button, can't post comments, can't use the 'New Topic' button from the main page of the forum to make a topic(So how am I doing this? I used the 'New Topic' button from within a topic). Every time I do, the window snaps to the top of screen but the favorite is not registered, or the new topic window doesn't appear. I have no idea what's going on.

Help?

That's... very odd. I just tried adding a new favorite, and it worked for me. The new topic window appears for me as well, and I posted a comment earlier. I'm no technical expert, so I really don't know what to suggest. I hope it's just a temporary bug you're experiencing. =/

Try cleaning your cache with CCleaner and try again! :/

Yes, it's likely a cache and cookies issue. Try clearing them and logging back in. I had it happen once to me, and it fixed itself eventually.