[vdr] strange problem with "extend whats on now"

[Guido Fiala <gfiala@s.netic.de>]

Since a few days i observe a strange problem with the feature:
"extended whats on now?" - instead of prime-time shows (20:15) it shows me 
19:15 shows and instead of late night (22:00) it shows me the 20:15-shows.

How can that happen? (I'am not aware i did change anything at my 
vdr-installation or plugins, timezone-info etc.)

Guido