Advertisements Hey gang- Got a letter today from Comcast/Xfinity that our Tivo Series 3 (and I'm assuming they mean our Tivo HD) is not compatible with an upcoming change to their service (MPEG-4). Surprised to not see this here or in a sticky or in the Official Comcast Cablecard thread. (Yes I searched so everyone just be nice.) Is our trusty Tivo HD really hosed? Thanks! Kupe EDIT- We're in the Atlanta Comcast market for those following this transition.