Tivo users in the Time-Warner network are discovering that there’s a new problem now that their cable boxes have updated with the new Digital Navigator software. Apparently, the Digital Navigator software does a download at the top of the hour and ignores channel-changing requests during that download — resulting in very intermittent channel changing for Tivo boxes.

Tivo is aware of this and has two possible workarounds. The first is to set your season pass to change channels one minute earlier and the second is to find the slowest possible IR signal and hope it works.