Of all the new HD channels, it seems like USA is the *only* one that ever gives me any trouble. Here's what happens ... When I go directly to the channel ... or go via the guide ... 99% of the time I get a "Searching for Signal on Tuner 1" (sometimes it may say Tuner 2). Then, I go up one channel and back to USA HD and it works fine. No other channels exhibit this quirk. Has anyone else seen this?