Hello, I've been experiencing an issue (I don't remember it happening before the 7.4.1 update) with exporting from an H.264/AAC QuickTime movie. I used to be able to export from H.264 videos (encoded with QuickTime) with no problem. Today, I discovered that exporting any H.264 video (to DV or AIC, for instance) results in choppy output video. It happens when adding an H.264 video to an iDVD project, exporting video with QuickTime Pro, and exporting the same video from Toast Titanium 8.0.3. Has anyone else experienced this? I've tried it on both my own H.264 QT movies as well as some of Apple's HD movie trailers. The output is always choppy (maybe ~15 fps, rough eyeballed estimate).