Odd one this, and I have done a bit of a search and found nothing helpful, so I suspect it may not be a common problem.
I'm running 9.10 Karmic on an X31 Thinkpad, and whenever I try to minimize (minimise for any fellow brits reading!) a window, it logs me out. I can log back in again fine, but when I try to minimize another window - I'm logged out again. It doesn't take me to a "Do you want to logout?" screen, it just logs me out. The screen goes black for a couple of seconds, and I am shown the login screen.
It happens with all windows. Firefox, Nautilus, Open Office Applications.
Anyone have any ideas? Thanks, in advance, for any help.