I know I have mentioned this a lot, but noone knows the answer, so I want to see if it is something to do with the CE from Friday. I am back at NR but still having the same problem. I have lost 2 of my local channels. No error message, just a black screen. All other receiver work fine. Another HR20-100 owner that lives near me is having same problems with the same channels and he downloaded CE too. It is only happening on this model receiver apparently. You can reboot while on these channels and they come back, but after a while they disappear again.