Mitch's xorg.conf fix works also for the RAT 3 version of the mouse, but with modified match and mapping:
Section "InputClass" Identifier "Mouse Remap" MatchProduct "Saitek Cyborg R.A.T.3 Mouse" MatchDevicePath "/dev/input/event*" Option "ButtonMapping" "1 2 3 4 5 6 7 0 0 0 0 0 0 0" EndSection
Mitch's xorg.conf fix works also for the RAT 3 version of the mouse, but with modified match and mapping:
Section "InputClass"
Identifier "Mouse Remap"
MatchProduct "Saitek Cyborg R.A.T.3 Mouse"
MatchDevicePath "/dev/input/event*"
Option "ButtonMapping" "1 2 3 4 5 6 7 0 0 0 0 0 0 0"
EndSection