I've noticed a lot of people mentioning pm boxes being full, and i've gotten 2 messages today saying someone tried to leave me a message but my inbox was full. I've had like 10 or more messages in there before and it was fine, but today with like 5 messages, it's been giving people the full message. Is there a problem board-wide?

Make sure you select "Show messages from the beginning" for both your folder "inbox" *and* "sent items" - you may have a lot in there. Once you hit 70 messages total in those two areas, I think you can send PMs but not receive any more... so the "sent items" could get pretty high! You can also clear out your "message tracking", but from what I've experienced, those do not "fill up" your PM box as the "inbox" and "sent items" do.

HTH!