I am getting awful pixelation (series 3) and have had comcast come out 3 times to fix signaling issues, and also added in some amplifiers. I am still getting pixelation issues and was hoping someone could help me with suggestions. Did you have to return the cable cards several times and switch out cable cards before you received a good signal? Tivo keeps telling me it is the cards! TIVO also told me that it was a software issue, but has retracted now and said that was for the TIVO HD models, and not series 3. I have no idea what to do. I want to make my TIVO work, but I have now 1. switched the cards out 8 times 2. had comcast come 3 times to my home. please help!