I have an S2 Tivo (have had it for several years) and a new S3 Tivo. As I was laboriously entering my season passes, I paid more attention to the "keep at most" option than usual, and looked it up. I found many online warnings that, regardless of disk space, Tivo will overwrite existing programs in order to stay within the "keep at most" limit. That has not been my experience in practice with the S2 -- for instance, I recorded 8 episodes of a show during a marathon of that show, and all of those recordings were kept, despite a "keep at most" of five. I think that makes sense -- if I'm out of space, go ahead and delete extra episodes. If not, just keep them. Is there a difference between the S2 and S3 on this point? Should I expect this to behave differently on the S3 and revise my season passes accordingly?