Be careful if you are going for the pacifist achievement, it seems wall kills are back. I accidentally killed a few guys and had to restart a couple save points. When you do a knockout from cover, you get animation when you throw back an enemy under your cover and if there is a wall, that enemy gets thrown directly to the wall and dies. Or worse, he gets inside of wall. If you think that newest patch is causing errors and previous was not, you can downgrade to previous versions by using beta option. Versions 1.1 and 1.2 are available in there.