[K12OSN] kwin crashing

[Jeff Siddall]

Recently I have been getting "Kwin is unstable it seems to have crashed 
several times in a row." when logging in with session set to KDE, and as 
expected no WM.  However, a dialog pops up that offers to try another 
window manager, and if you select metacity it does work.

Subsequently running "kwin --replace" results in kwin crashing and no WM 
again.  Any ideas what might be causing this and how to get kwin working 
again?  There did not appear to be any updates to kde or X installed 
recently so I am puzzled.

One perhaps related strange thing is that, regardless of whether 
metacity is running or even with no WM at all, clicking the "Desktop" 
icon in the systemsettings app causes the app to crash.  This makes me 
think it may be related to desktop effects, but it could also be 
unlreated.  Removing ~/.kde does not prevent the problem.

System is running SL6.

Thanks,

Jeff