and it doesn't recognise the 'scroll up' event, instead is mostly
(80% of the time in some apps more than other) thinks I
right-clicked.
although i doubt that you still have this problem, i reply because it
might help other people who have the same problem.
setting the protocol to ExplorerPS/2 did the trick.
here the full configuration:
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/psaux"
Option "Protocol" "ExplorerPS/2"
Option "Emulate3Buttons" "true"
Option "Buttons" "3"
Option "ZAxisMapping" "4 5"
EndSection