Can somebody explain this? I'm watching the Cardinals/Arizona game. I'm on the Cardinals HD feed. The signal is definitely 720p. But the game is 4x3 with the black bars on the side. The news scrollbar at the bottom goes all the way across the screen when it pops up, as well as some HD commercials, so the channel is definitely HD. Is this an error by the broadcaster, or do they really think a 4x3 picture qualifies as HD?