It's a pretty annoying change. It's the same show, the same channel, and the same time. But the old Season pass doesn't work. I missed the episode as a result. Luckily I was able to find someone who had it.
2/25/2004 - 7/24/2006: Tivo Series 1
9/25/2006 - 7/24/2010: DT Tivo Series 2
7/16/2010 - 12/25/2011: Tivo Premiere
12/25/201 - Current: Tivo Premiere Elite