I had the same problem with season passes not working, even though there was plenty of guide data. and I found this on oztivo.net.

http://minnie.tuhs.org/twiki/bin/vie...aveNoGuideData

It worked for me and now everything is back to 100%.
Note you might have to replace the 'fixtivotime' with

touch /var/timestamp

if you are running the 1.4 image.