Two things you might consider: - iMovie 2.1.1 can't export to QuickTime if Roxio Toast Titanium 5.0.1-5.1.1's Toast Video CD Export 1.0 is in iMovie's Resources:Plugins: folder. Toast Titanium 5.1.2 installs Toast Video CD Export 1.4 which fixes this. With new Toast versions this is not an issue. - QuickTime export may fail if the ~/Movies folder is missing. Re-create that folder if that is the case. BTW, I skipped iMovie 3 because it was so buggy.