I don't think it is a common problem.
If the linkage was worn then the wiper wouldn't travel far enough as opposed to too far and would possibly apply to both wipers.
Has the arm been removed recently, for a windscreen change for instance. How far is it from the bottom of the screen when parked?
Obviously you can move the arm round on the splines, one spline would probably do, but be aware that the blade may then hit the bottom of the screen.
Vic.