Seems that some Tivo HD users are having problems with the second cablecard (in slot 2), and many theorize it is only with the SA cards. Don't need to discuss that - it's being handled in other threads. However, several of the posters have said that when their cable company exchanged the SA card for a Moto card, the problem went away. I thought that the cablecard had to be matched with the headend equipment. SA card with SA headend, Moto card with Moto head end. Is this not the case? Or is there a third headend manufacturer who may be compatible with both cards?