They are all going slightly like that..fronts are worst...see it on lots of others too. It's the metal inside the strips coroding and causing the rubber the bulge. Once in a while I take them off...bend then straight...then they look fine for another few months! Needs a new set really....but they are stupid money. I was looking for a set like I found for my Jeep...they were made metal free with plastic internal reinforcement....life time guarantee against going out of shape...but they went bust.What up with the window seal on the driver's door?