When I run iTunes off my library that is hanging of my AEBS, iTMS 128AACs work fine, but I don't have enough throughput off the drive to play lossless audio files. Haven't dared even attempt video. I am not using wireless. This is on ethernet. It is, however, off my main router, an AEBS. I never had this problem under Tiger. Internet seems slowish but okay, but this feed off the drive is pathetic.