You seem to be in the Montreal area, 2.1 shall be your strongest signal. I observed similar behavior this sunday night with 10.1 (physical at 11) the tivo diagnostic report a signal strenght of 85% and SnR of 33db NO RS error and we clearly see some pixalisation. This maybe a tuner overload?This has been my experience as well, but on slightly different channels. 2.1, 33.1 and 57.1 have been the most affected by random pixelation / drop-outs. And I have a strong UHF setup, with none of that occuring before. What is your true azimuth to Mt. Mansfield ? Trying to determine if this is a local, point source on our path or if it is distributed.