happening to me in gnome screensaver. only way back to the machine is to go to terminal and kill the gnome-screensaver processes.
Linux eeebook 2.6.24-21-eeepc #1 SMP Thu Aug 7 22:18:05 MDT 2008 i686 GNU/Linux
-rw-r----- 1 root shadow 911 2008-11-01 16:06 /etc/shadow
happening to me in gnome screensaver. only way back to the machine is to go to terminal and kill the gnome-screensaver processes.
Linux eeebook 2.6.24-21-eeepc #1 SMP Thu Aug 7 22:18:05 MDT 2008 i686 GNU/Linux
-rw-r----- 1 root shadow 911 2008-11-01 16:06 /etc/shadow