Quicktime Export - Double Speed

I have had more problems with Quicktime Export ever since upgrading to Snow Leopard. My usual way of doing things is to edit my movie, then export to +Quicktime Movie+ using the same format (ie not +Quicktime Conversion+...). However, every time I export that way, my movie is running at 200%, while the audio is running at regular speed. Anyone else having this issue? Anyone know how to fix it?

2 ghz iMac Intel
FinalCut 6.0.6