well you found it, and it is a simple solution. You must edit your /etc/X11/XF86Config file. open that file in your favorite text editor, as the SU of course, then find the following section:
(that is just what the top two lines are)
make sure that you have two options these two options:
Option "Protocol" "IMPS/2"
Option "ZAxisMapping" "4 5"
That should do it. I am kinda suprised Psyche didn't do that automatically, oh well. :P : 8)