Ok, I've been having this issue with one of the CableCARDS giving me the message: "MISSING_PROGRAM_REKEY" I tried about 6 times to have the central office reauthorize the 2nd CableCARD in the Tivo 3. A technician came to the house today, and, very respectfully, listened to want I told him. He then tried having the card reauthorized, but nothing happened. I did, however, get one of the errors with I assume was the "good" error. Still, the second card showed "MISSING_PROGRAM_REKEY." The tech decided that we should try switching the CableCARDs around. I informed him that it had to be done ONE AT A TIME. We put the unworking CC #2 into CC slot 1 and he had the central office authorize the card. Suddenly that card that had not been working for 6 days indicated AUTH: SUBSCRIBED! At this point he asked me to put the CableCARD that was originally card #1 into slot #2. So I did... ...and after about a minute the original CC#1 that was NOW IN SLOT #2 turned out to have the message AUTH: SUBSCRIBED as well. The tech was adament that either card would work in either slot. That he frequently troubleshoots TV problems by moving a CableCARD from one TV to another in the same house, and then having the CC reauthorized or "hit." It appears that he was correct... because everything is now working! Cooooool.