Bought a new Roamio Plus about two weeks ago, and I went to Comcast and obtained a Cisco Cablecard. After installing everything, I had numerous intermittent problems, including error messages and messages indicating that I did not subscribe to certain channels. I then wasted a lot of time on the phone with Comcast. Fortunately, I found a Comcast forum that perfectly described my problem as a firmware issue If you log onto that forum and complain, then somebody named "ComcastTeds" will update your firmware to version 184.108.40.2061 and all of your problems will disappear. Basically, Comcast has known about these firmware problems for two years. They could have fixed them and saved everybody a lot of grief. But, they didn't fix their defective CableCards, because they want to discourage people from using Tivo. Here is the link: http://forums.comcast.com/t5/XfinityTV-and-Equipment/Cisco-Firmware-1-5-3-1101/td-p/1967519 Good luck!