Has anyone had any success getting Comcast to upgrade your cable card firmware? When I asked at my local Comcast store the lady hardly knew what a cable card is much less anything about the firmware. I am currently running firmware version PKEY1.5.2_F.p.1401. I would love to get upgraded to a firmware version that actually allows all 6 tuners to work. It is very frustrating being stuck between TiVo and Comcast.