Re: 185.18.08 crashes KDE4 w/ composite
I also have the exact same problem on my laptop with a 9600M GT. If I disable kwin's desktop effects in kwinrc I'm able to start kde 4.2.3 without problems. If I then try to turn on the desktop effects from the configuration dialog, I get an error message from kde saying that it was unable to turn them on, but no crash.
I was also previously experiencing the powermizer issue which is now fixed.
Bug report attached. (Note: there's some API mismatch errors in there, but those are only because I tried to load a game with outdated lib32-nvidia-utils as I'm running 64-bit)