I had a similar problem in Hardy.
When i tried to log out the computer frezze for about 1 minute. Durint that time interval I could only press Ctrl+Alt+Backspace
I was only using GNONE without composite manager.. but previously in feisty i was trying the new KDE.
Removing the whole .kde folder solved the problem .
I have no idea why some file in .kde were blocking the gnome-seesion --kill
I had a similar problem in Hardy.
When i tried to log out the computer frezze for about 1 minute. Durint that time interval I could only press Ctrl+Alt+Backspace
I was only using GNONE without composite manager.. but previously in feisty i was trying the new KDE.
Removing the whole .kde folder solved the problem .
I have no idea why some file in .kde were blocking the gnome-seesion --kill