One of our local PBS stations sometimes transmits a 480p signal. I have strong signal strength and can watch the station with my TV's built-in tuner but the 921 does not decode video or audio for this station when it is broadcasting 480p. Has anyone else seen this problem? I've tried a quick search for trouble reports but did not find anything. This is a problem with receiving a native 480p signal, and not a problem formating a 480p output. Most stations seem to use 480i, 720p, or 1080i so this problem may not come up much.