I did an upgrade today and after figuring out why the nvidia driver wouldn't load (I had to manually delete libGL.so among other files), I discovered that my PVR-150's wouldn't work. Everything appears to load correctly including the firmware, but I was unable to get anything out of them. After downgrading to 0.4.2 they work perfectly again. I didn't have time to debug since I'm running a MythTV system that is constantly recording.
Scratch that. Now I get video, but I'm unable to change channels. I'm now downgrading to 2.6.15.
Everything is back to normal after downgrading the kernel and ivtv. I'll just hold at 2.6.15 and 0.4.2 until I have more time.
i had the same problem. i went through and used slocate to clean out all the places the firmware was, including the firmware installed with pacman. then following http://ivtvdriver.org/index.php/Firmware put the firmware in /lib/firmware/ where pacman will put it instead of where the wiki said.
to get ivtvfwextract.pl, download the ivtv src tarball
to get v4l-cx2341x-init.mpg, copy /var/cache/pacman/pkg/ivtv-0.6.1-2.pkg.tar.gz to a tmp dir and extract it. the file you want are ivtv/lib/firmware/v4l-cx2341x-init.mpg.
so in the end i suppose there a firmware file missing. i didn't pay attention to see which one, was jones'n for tv