Had my 722k do some interesting things starting yesterday. The screen would freeze every so often. The odd part of it is that it only seems to happen during commercials. That is, watch the show with no problem and then the channel we're watching would go to commercials. Everything would seem ok until you got to the end of a commercial (seemed to be the last commercial before either going back to the regular show or regular advertising for that specific channel). The remedy would be to just change the channel and change back and everything would be ok. Tried waiting a few seconds but nothing would happen. Tried to skip back using dvr, and that did nothing. In fact, when doing that it wouldn't even change the channel or anything and I had to reboot the receiver. When watching a movie channel with no commercials, we can watch it for hours and hours and not have it happen. Only seems to happen when the commercial channel is trying to switch back from commercials to regular programming. Just wondering if anyone else has experienced this and what the problem could be (something with the software, hard drive, etc.).