I've had my 811 for a couple of months now, and while I have no problems watching CBS-DT OTA here outside of Buffalo, NY (WIVB), I've been having some problems with NBC-DT (WGRZ). Namely, while trying to watch the Daytona 500 right now and the audio sync is off, a slight bit delayed. Of course, right now it just went back to SD and the sync is fine. So HD NBC sync is off and SD is fine. Any suggestions?