OK, I have two Tivo HD's - both stock hard drives. Last night, they both went for a dive and froze up. One was rebootable, and so far, one has not come back. The one that I was able to restart (after pulling the AC cable) has software version: 11.0k-01-2-652 Does anyone know when that came into being? I am suspicious because BOTH my HD's (with Cox Cable Cards) froze up within two hours of each other.