Mouse goes crazy

[Jonathan Villa <jvilla isdesigndev com>]

Ok, I have had Yarrow working well for a while now, but yesterday I
started experiencing some odd issues with my mouse.  All of a sudden it
stops working correctly.  The only thing that seems to fix is to kill X
and run mouse-test, then restart.  

Any ideas?

Also, I have FC 1 running on a desktop which is hooked up to a KVM
switch.  Whenever I go to another PC, and return, the same thing
happens, the mouse goes crazy.

???