Does it do it when you are actuall holding the mouse? or is it when it is just sitting there idle?
My neighbor said he was having a similar problem but it turned out to just be the slant of his desk moving the mouse just slightly in that direction
Is it a cordless mouseman optical from logitech? I seem to remember mine doing something like that when I had one. I had gotten the Cordless elite duo a while ago. The keyboard still works good but I ditched the mouse a while ago. It was a referb system so I assumed it was just broken, maybe it is an actual hardware/software flaw.
<A HREF="http://www.folken.net/myrig.htm" target="_new">My precious...</A>