After this update, streaming large movies from my Mac Pro via iTunes as I've always done in the past now (BD/DVD rips) has significant issues. It's almost as if it is dropping frames or somehow the buffering is getting off track. The audio is always fine and the picture "looks" great. If I stop the movie and resume, all is well for another 10 minutes or so until it begins to get worse and worse. This is not with just one movie, this is with all the movies that have played without issue time and again in the past. Definitely something up with the update. It almost seems as if ATV is no longer releasing the already used portion of the stream and begins to stutter as it nears it's capacity limits because when I resume the stream it often has to begin buffering from that point in the timeline instead of resuming with an already buffered stream.