iTunes 11 Playback via AppleTV drops during Video streaming.
If I am streaming a movie (no matter rented or bought) from my iMac (iTunes 11) via my AppleTV (3rd Generation, latest update) the playback drops after the iMac falls asleep.
It's really annoying to stand up after a while and press space bar to keep the iMac awake.
iMac [2.8 GHz Intel Core 2 Duo / 4GB 800 MHz DDR2 SDRAM]