ARgh! I've just had the same movie crash on me after about 3 mins of playback on me for the forth time. A 720p encode of a blu-ray, using the ATV 2 preset on Handbrake. Has played back fine on previous ATV OS versions, now suddenly booting me back to the top menu after about 3 mins. Looks like I'll have to figure out how to downgrade back to 4.2.1.