For what it's worth, I've been having this same exact problem here in Indiana. Comcast moved all their HD channel numbers from 900-999 to 1000-1999, and since then (22-December) none of my Season Pass programming for HD content has worked.
Comcast claims it's TiVo's fault, and TiVo claims it's Comcast's fault. But it is *ME* who is paying the price, as my new and expensive TiVo Premier XL unit is no longer able to operate as it was designed to do.
Sure, I can manually set up a recording for the new channel numbers, but the recordings are only saved with a cryptic name rather than the actual name of the program, and after I get a few recorded, it's nearly impossible to figure out what they are. And I'm unable to program any Season Passes, or to update the many many Season Passes that I've already spent time programming (and which now no longer work).
This crap has been going on now for nearly 3 weeks, and I'm still paying money to both services, yet neither of them can seem to resolve the problem. I'm so @#$%^'d off at both of these companies I could scream.