mouse unstable on rc2

[david at lang.hm]

I upgraded the machine that I've been useing daily for the last month, and 
I'm noticing that the trackpad is acting very skittish at times. a reset 
will clear it up for a while, but it comes back.

I have not had this problem on this hardware with prior builds.

I have also seen this on my second box, but I haven't been useing it as 
extensivly so I can't promise that it never had a problem before (it was 
still on build 650 prior to this weekend, with no noticed problems.

David Lang