hmmm...I did notice some trouble with my installation and ZDF a few days back, but thats gone now.
Other than that its working fine... EinsfestivalHD is still a bit jerky with a few framedroppings.
Perhaps an issue with your TV-Card or your LNB?
What card are you using? I got an Hauppauge Nova HD S2
I am using an tecnoTrend S2-3200 - einsfestival HD I have found and now with one of the latest versions of avenard the the "always" stuttering bug was fixed. That plays fine. Not sure if that is DVB-S2 though !
But I can't seem to get the ARD HD (and the others) scanned. Scan-s2 finds them - see also here :http://forum.linuxmce.org/index.php?topic=9700.0