I have a S3 model since April with two cable cards and it worked well form the start. However, about a week ago the machine would start to freeze up, have pixelation issues, sound interuptions and slow downs. Everything seems fine as soon as I disconnect the cable. I called Tivo suppport and they immedeatly blamed the cable cards. So I called Comcast and they send a technician. We exchanged the cards but the problems would not go away. They show up immedeatly on HD channels but then "spread" to other channels over time. So, I called Tivo support again. Long waiting time, suddenly a response by Geek Squad "oh, I don't know why you ended up here" and then again long waiting time until I had a Tivo support person. She wanted me to do all the trouble shooting again. I told her I went through this and she admitted then it is a software problem but she does not know when it will be fixed. I pointed out that my Tivo did cost $800 and I cannot use it since a week but she said "that's the way it is". I am sooooo mad with Tivo. They need to inform us about these things. Anybody else having these problems?