I had problems during Medium also. I wonder if they're getting the WXIA signal OTA? With all the fog and such in the area last night, I wonder if that had anything to do with it....
I'm in the Chicago DMA and am experiencing moderate pixelation on some MPEG-4 channels. Signal level is mid 90's and above. Also having lip sinc problems and audio dropout problems. Sounds like a D* transmission problem. Not all the bugs worked out yet.