had that happpen to me, see this thread http://isiforums.net/f/showthread.php/5620-heat-haze-problem the fix was in post number 7
Thanks for the link. It is definately supposed to be Heat Haze then. I get this with or without AA using default Nvidia settings but only in the mirrors, my view out of the windscreen or with other cameras is fine.
I'm getting the same thing here. I think it may have something to do with the gamma changes made in the latest build.