Just updated to iTunes 7. Install seemed to go fine, iTunes scanned my library for gapless playback etc. and then I restarted. As soon as I tried to play music to test the gapless playback, I realised it won't play at all. The little speaker icon to the left of the song name shows the song as playing but there is no activity on the timer bar at the top, it just stays at 0 with no sound. Other applications play sound OK. iTunes said something about video playback requiring Quicktime 7.1.3. I haven't updated to this yet. Could this be the problem? Anyone else experiencing playback problems?