Yep, that's exactly what I noticed, too.One thing I have noticed is that I can tune to any of my TV channels from the TV Server config using the preview button the problems only start if I go into MP and try to use the TV server from there.
Sorry people, i am a HUGE fan of MediaPortal, but i find it extremely frustrating that as soon as i start to enjoy a stable installation it all goes t*ts up when i try to upgrade it.