I followed your suggestion so I cold rebooted my hybrid (also unplugged power cord) and next reboot went fine. IVTV error messages disappeared and all seemed to wor fine. Then I started MythTv player and my system crashed (not totally, still able to ssh and use remote orbiter, but no other media playable)
I had no chance than reboot again, but then IVTV messages reappeared.
So I think there is still something wrong probably on firmware loading.