Where there any changes made to your xorg.conf file when you upgraded to 9.04? You should now be using a newer version of the xserver, which may require more detail in xorg or may require less. Just depends. If you would open a terminal and run the following commands, then post the output here, that would be helpful.
Code:
cat /var/log/Xorg.0.log
cat /etc/X11/xorg.conf
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Arch64 ~ PekWM