It does indeed crash for me too. Brand new install of Tiger (monday) and iWork '05 Trial (tuesday). I have an odd feeling it's due to H.264 encoding not being supported in anything but QT7 Pro. But i'm going to file the bug report anyway, it shouldn't crash, it should give a dialog box stating you can't do that if that's how it's supposed to be.
EDIT: bug report is filed.