On Friday KTVD-DT 20-1 and 20-2 Denver changed their broadcast signal and said a 'rescan' would be necessary to continue watching. I rescanned my Roamio OTA and both my TVs which are all connected to the same antenna. Both TV's recognize the new signal correctly as HD and show correct guide information. The Roamio OTA found the channels, but list them as SD and after over a day show 'title not available'. It seems there is something wrong in Tivo's database for these channels. Please, could someone at Tivo please correct this.