I've not seen this problem talked about before. I mounted my mirror to the windshield post and all is well with that. My problem is the black mounting piece that is on the mirror is not tight against the mirror. There is free play between the mirror body and the black piece. The only fix I see is to dissassemble the mirror and drill out the mounting brads, insert a rubber gasket between the mount and the mirror body and rivit it back on. Anyone else have this?