Just bought an atv last night and am just now getting to play around with it. I have all my movies stored on a usb external hard drive attached to my iMac, and they are all in my itunes movie directory. I have an all n network (imac, aebs, macbook, atv) and whenever I go to play a movie, it stops every thirty seconds (or sooner) and the blue bar comes up at the bottom and has to re-buffer. Needless to say, this is not acceptable performance. all my movies are encoded in handbrake, either as .264 or mpeg4, and they are between 1-2.5GB, averaging around 1.6GB. I have already unplugged the atv and gave it a few minutes, as I searched and this worked for some. Previously to the atv, I had my macbook hooked up to my tv using either frontrow or just quicktime to stream the videos, and that never gave me a problem, so I have to think it is the atv. Any ideas? This is really frustrating.... oh yeah, I have the 40GB atv, and at first I thought it was a problem because the atv was syncing with my music,photos, and I believe 5 movies, however, I have removed all of those, turned off syncing, restarted the atv, and the appropriate combination of the above, and it still is not streaming. oh yeah part 2, trailers and youtube videos stream perfectly, so is there something wrong with my video files? what would I check-what should they be?