On my HR20-700, every 3-4 days for the past few weeks I am getting 771 "searching for satellite" messages on most of my local OTA stations. When this occurs, I have checked the OTA signal strength on each affected channel and am getting stellar numbers - high 90's to 100. This problem does not affect our local NBC affiliate, 4-1 and its subchannel, 4-2, or any of the satellite channels. Also, when this occurs, 4-1/4-2 also maps to our two local PBS affiliates, 10-1/10-2, and 36-1/36-2. A simple reboot solves the problem each time. I have had the HR20-700 for approximately 2 years, and never had this problem, which I believe started after my latest software update in mid-April. I am guessing this is an issue with the DVR. Has anyone else experienced this problem?