I think the issue with Rage only affects the S3 TV guide (http://hd.oztivo.net/tivo-bin/tvguide.pl rather than http://www.oztivo.net/tivo-bin/tvguide.pl).
I have made some changes which I think should fix the Rage S3 issue around 5am tomorrow morning, at least where the listed duration for Rage is >= 3 hours.