Hi melstig,
I had similar problems when I first installed RC1, but the other way around. When I did a manual import it worked fine but with the automatic import it found all channels but imported no programs. I played around with the system for a while and it suddently started to work. I did try to use the xmltvimport.dll from a pre-1.0.0.0 installation just in case something had changed.
This probably won't help
/Peter