My wife has been seeing video breakup on cnn channel 200, then today channels 172/173 are impossible to watch, I get video thats all broken up and jittery. I am not sure if there are other channels affected or not, but I am able to watch 110 channels without a problem. I thought that maybe it was an issue with my 942, so I checked it on my 510 and 522 and I have the same issues, I am pulling well over 100 for strength. FWIW it was only around 80 or so here today, I am using a dish500 with dp34 switches.