Thank you for your advice, here's the output of sp-oops-extract /dev/mtd2 (too much text to paste):
http://dl.dropbox.com/u/3396075/oops.log

I uninstalled most of the applications yesterday - to see if it helps.

I can't read the log but there's one thing that puzzled me - joikuspot module and process joikuspot_napt. I uninstalled Joikuspot long time ago (a year or so) it's not in the list of installed apps - is it just an old record?

I'll be grateful for any help.