Moments ago I upgraded to Xubuntu 9.10. But, now my computer doesn't shut down, and I have to press my cpu button to shut down.
It shows a long message. A part of the message is this:
Ubutu login: [1011.926021] Buffer I/0 error on device loop0, logical block 931886
This has nothing to do with Xfce. A Google search show it's a Ubuntu problem.
Um, sorry for not being helpful.
Some other links if that would help you to find an answer:
Thank you very much. You really helped me! Now my computer shuts down properly.