Weird mouse behavior

[Chris Gramer]

I'm using a Microsoft optical wheel mouse via the PS/2 mouse port on my
machine, and sometimes the on-screen mouse pointer and its location as
far as the system is concerned are off by maybe 100 pixels to one side. 
Like to click on something, I have to put the mouse maybe 100 pixels to
the right of the thing I want to click on.  Any idea what might cause
this?  I'm using FC3, all the latest updates, and using GNOME as my
desktop manager.  Thanks!

-- 
  Chris Gramer
  cgramer at fastmail.fm