On my car the lower right screw holding the license plate surround on was over tightened and damaged the surround at the screw hole. I've seen this on many cars (same hole). Anyway, I was fixing that damage with fiberglass and epoxy and noticed that the license plate sits higher than the surround. I'm wondering if this is the vibration (noise) I get in third gear with hard acceleration. I can see where that right lower corner has worn the black paint off the rear fascia.
I'm thinking of cutting the fascia to provide clearance for those brackets holding the license plate on which stick up the highest. I also think I will fiberglass all four of the surround holes for added strength. Maybe a little foam on the back of the license plate to prevent buzzing.