Does setting dolby digital to "auto" within your ATV3 settings work for most of you? If I set mine to auto, it always defaults to stereo. I have to set it to "on" within settings in order to get surround for movies. Maybe it's just that my sony receiver is about ten years old?? It would be nice if auto worked though, as some of the TV shows I have are only in stereo. It's kind of a pain to have to switch it back and forth in settings depending upon what we're planning to watch.