That is weird!
When you said there was "nothing there" I thought you meant that the page didn't display at all! I had that happen to a quiz once but it fixed itself. I've never seen the page load without the quiz questions before, though!
Sacrificing myself on the altar of curiosity, I submitted my nonexistent answers. The quiz questions are there all right (I got all of them wrong, whoohoo!), they're just not loading where you can actually answer them.
I, for one, am stumped.
Could a General editor check the quiz over and see if there's something there that would cause this? I don't see how it could be anything wrong with the quiz, per se, but it's a place to start. If you can't find anything we'll probably have to appeal the the talents of Terry. 