I was helping a friend set up his new 50 Panasonic 1080p plasma, and we were stumped about something. Even though we went into the set up menu in the Direct TV HD receiver and unchecked 480p, then checked 720p, 1080i, and 1080p, when we hit 'Info' button on the TV remote control, the TV said that it was broadcasting a 480p signal. The receiver is hooked up to the TV versus HDMI. The picture looked good, but not great. Not as much definition as I've seen on other HDTVs.