Has anyone had the following problem. iTunes playback is working fine, but in the middle of a playlist, individual songs will come up next to play, appear on the tv screen, but won't actually play (progress bar comes up, but stays at zero). I've tried manually hitting play, select, fast forward . . . nothing. Used the apple remote, my programmed harmony remote and the remote app. Makes no difference. If I skip to the next song in the queue, it will auto play fine, but the one after that may not. Can't even imagine what the problem could be. Any ideas would be appreciated.