As with Larry (and probably about the same time) I grabbed a 85/1.4G and shot against a flat painting with a nice torn edge. I saw some variation between shots (even using the same focus point) but no difference associated right to left. My s/n starts with 3001xxx (the referred topic says 8000xxx to 8001xxx.
Not implying either there is no problem, just that there are cameras that appear to have no problem.
I will say that I see far more variation in the fine tune needed on this camera than any other I have had. I don't know if they changed what "-10" means, or it is just somehow interacting with the lens to require more. My 14-24 for example took about a -16, and it made a big difference in focus.
Live view is very nice, as it gives a good objective standard shot you can judge others against.