Yes they have, you can find several topics and many posts on this subject by doing a search, but there are 3 ways to solve the issue and just messing with it isn't one of them, one way is to purchase a new arm from the dealer, another way is to remove the arm and using a dremel to remove a little bit of metal in the area where the hinged portions hit each other on the underside, if you do the search you can see better what I'm referring to, a 3rd way is an after market spring that attaches to the arm that helps apply more pressure at the hinged area and thusly makes the wiper fully seat to the wimdow, like I said the 2 work around methods can be found by doing a search.
I would do the search for you but I'm short on time at the moment.