I was happily using my machine today, and for some reason, (btw I have a dual head setup) the cursor dissapeared on ONE screen ... The left one. As soon as I dragged it back to the right screen, it re-apeared, back to left, gone. I played with it out of curiousity, and nothing worked. This would probably be impossible to troubleshoot, as it never happens. But I thought I'd share this strange experience and see if anyone else has ever seen it.
A restart was all it needed. Strange...
-- Zak