Tivo Roamio (6 tuner cable only version): Several days ago I noticed that guide data was missing, entire gaps, missing a day or more, saying to be announced. I ran guided setup, which took a while, but didn't seem to have any effect. Next step, I ran clear guide data & todo list. I started this at around 4pm on Tuesday, by 1am (wed morning) it was still running. Assuming something just got stuck I power cycled, and it went right back into the Clearing Guide data screen (of course promising to only take up to an hour). Now its almost noon, and its still running. Am I hosed? Except for missing guide data, there haven't been any issues or other symptoms.