By updating, I mean syncing and uploading video wirelessly from my mac. I have everything saved to the AppleTV HD and never really stream anything. By the way, this only happens if I try to turn the AppleTV on whilst it's syncing. If I'm playing a movie already and then start syncing, the thing works as normal. Weird. Also, is it normal for a 1GB movie to take almost an hour to upload? Everything else involving my network is working absolutely fine.