It is also freezing quite often (approx. once per 10 minutes) while plaing World of Warcraft even with disabled composition.
If you would need more logs, then just tell me. I have already uploaded couple of logs some time ago. Look at http://www.nvnews.net/vbulletin/show...7&postcount=67
(system description) and http://www.nvnews.net/vbulletin/show...7&postcount=68
(nvidia-bug-report and Xorg logs).
I have also tried the most recent versions of linux kernel, nvidia drivers, Xorg server and KDE and the problem still persists.