A recent TV guide update appears to have resulted in a loss of all channels from 32 to 71. I have COMCAST (Portland, OR) and for over 1.5 years my guide updates have always shown Ch's 1 - 71. For the last 48 hours the upper channels are not even listed. My TV can still access those channels, so they haven't been dropped. I've rebooted & downloaded the most recent guide. I've re-ran TV Setup & elected "No Guide" then rebooted & tried again, electing to use the guide, but still same results. I've been searching/reading 100's post trying to get an idea why this is suddenly happening and how to resolve. So, the guide is downloading & displaying channels, but not channels 32-71. Oh, I can manually add and access the missing channels, which will work in a pinch, but of course the channel lineup shows "no data available." Anyone have any ideas or suggestions?