Comment 49 for bug 615892

This bug still exist in ubuntu 11.10 as of the date of my comment, the status of bug must be changed.

#to fix follow these steps:

cd /usr/share/X11/xorg.conf.d/
sudo nano 910-rat.conf

# add the following to the file

Section "InputClass"
        Identifier "R.A.T."
        MatchProduct "R.A.T.7|R.A.T.9"
        MatchDevicePath "/dev/input/event*"
        Option "Buttons" "17"
        Option "ButtonMapping" "1 2 3 4 5 0 0 8 9 7 6 12 0 0 0 16 17"
        Option "AutoReleaseButtons" "13 14 15"
        Option "ZAxisMapping" "4 5 6 7"
EndSection

# save by pressing Ctrl+X then Y then Enter
# reboot
sudo reboot now