After a week of trying, my Cable Card is working with Charter. After 3 calls and 1 chat session with no luck, we had a truck come by today. The technician spent 4 hours rewiring inside the house, playing with a tuning adapter (which has not been rolled out in my area yet and should not be needed), and trying 2 different Cable Cards in addition to the card I already had installed. He had done everything he knew to do and blamed Tivo. I then called Tivo for help. After walking through a few diagnostic screens, Tivo determined that we had a signal quality issue and blamed Charter for the problem. With this bit of information, the technician went out a dropped new wire from the pole to the house, which made an entire run of new wire, new junctions, and new splitters all the way from the pole to the house. Of course, this did not help. Finally, the technician determined that I had a bad Tivo. In desperation, I made yet another call to Tivo, this time getting a different person. This time, we looked and some different diagnostic screens and determined that the card was not paired completely. Apparently Tivo's require an additional step in pairing the card with the equipment. The technician was able to explain this to his office, who programmed the card again, and now everything is working great. In summary, I think it is wise to get Tivo involved early in the process. Sometimes they are right, and sometimes wrong, but I think they have a deeper knowledge than the cable companies about how the Cable Card works in the Tivo. Regardless of anyone's initial conclusions, you probably don't have a bad Tivo, bad wiring, or bad Cable Card, and certainly not multiple bad Cable Cards.