Originally Posted by
kleinma
I am assuming these are the types of mice that have a click to the wheel? Can you tell if those clicks are starting to get worn away? I have had mice where the clicks in the wheel would give up, and sometimes when you would scroll the wheel it wouldn't sit quite right, and then would slide back to the previous click, and that would cause a scroll to happen.
Not sure why you would see this on 2 machines with 2 different mice unless it has something to do with how you use them causing the same issue.