This is driving me mad. Until about 3 weeks ago my setup had been reliable and rock solid for months. i5 Mac Mini connected at 1000MBps to a new AEBS. iTunes library shared via FW800 connected Drobo S. ATV2 with wired connection to the same AEBS. All software up to date, have rebooted everything, turned home sharing on and off. Yet when streaming TV shows and movies, the buffered stream is only just ahead of the play marker meaning you get stutters and freezes as it rebuffers. Any ideas? Its as if the ATV has changed the way it buffers media but I can't see why it would have done that and there's so few options in iTunes that I can't see what else I could change.