Just passing an interesting experience I had last night. I purchased an HD movie and got about 25% downloaded, while watching it, and my wife switched from my login to hers (actively, without logging me out) at our Mac, upstairs. So at some point the Apple TV informs me it is unable to download the movie and I find that I no longer have internet connectivity at the Apple TV. After checking the Mac and finding out about the wife's work on the computer, I asked her to switch back to my login and sure enough the Apple TV started to work fine again. Movie downloaded no problems. I thought the TV was indepently accessing iTunes and downloading movies?