not an issue with me, i think that is why i use the keyboard so much, have to keep them both occupied and in sight.
favorably i am left handed, but through school, i ended up having to use my right hand due to the schools set up. after a while i had to ware a brace due to pains in my forearm and wrist, at the time i was doing a lot of animation/design work... it always angered me that i was put in situations where i was not capable of using my favorable hand and now i find it just plain inconsiderate when i go out and have no option, i.e. pee cee mice. i can mouse around for hours with no symptoms ever with my left hand, but after a few hours with my right, the pains come back so the only happy medium, because i will just grab the mouse with which ever hand in closets, even at home due to my own neglect, i now use the keyboard as much as possible.
that is my sob story, feel free to play your mini violins for me =)