Recently I've been having trouble with iTunes randomly not playing songs (although possibly only after waking from sleep, as a put my iMac to sleep frequently). Everything will look OK, and the play button changes to pause, yet the songs don't start and the timer stays on 0:00. Does anyone else have a problem like this? Or a solution? I have a feeling it may be some kind of quicktime issue, but I imagine the good people of Macrumors will have a better idea than me. Thanks a lot.