I've just upgraded to iTunes 7 and I'm having problems adding video files to my library and iPod. I was hoping whatever bugs I got the first time I tried this had gone away, but now I'm wondering if I'm just doing it wrong. My video files are mp4, and I've tried adding videos that are tagged with Lostify and untagged. When I drag the file to the iTunes window, the green plus symbol comes up, but the file just isn't imported into the library (there is no message about why). When I look at the video file on my computer, it shows that it should be opened in iTunes and the preview function works, but iTunes just won't accept the videos (which all worked fine with the previous version). Any advice, or should I just try to put iTunes 6 back on my computer?