Important TiVo NBC Season Pass Alert.
NBC is airing shows on Thursday evenings with nonstandard start times and lengths. Your TiVo DVR will automatically start and end the programs at the times given by the networks, but this may cause some shows on different channels to conflict with each other because they now overlap. Conflicts will be automatically resolved by the Season Pass Manager based on the priorities that you have previously given each show.This means that, if shows you have selected to be recorded with your Season Pass overlap, only one will be recorded!
Example: ER starts at 9:59. CSI ends at 10:00. If you have a TiVo Season Pass for both, your TiVo will record the one with the higher priority in your Season Pass List.
PVRBlog has more on the issue.