Hi David:
I do not have 6i, just 5.1.1.
I did reduce the acceleration from full blast (5) to step 2. Going all the way to the lowest step (1) caused jumpy window scrolling. Don't know if this will help, but it won't hurt anything either.
I think the real problem was a Windows\Temp file loaded with junk. Erasing all of it may have fixed the problem, but it's hard to say with a problem that's only happened once.
If you are running two versions of labVIEW at the same time and they both write the same files to the Windows\Temp directory, that could be a problem.
Thanks for the tip,
Brooke Clarke