Patch is top notch it has fixed the problem with invisible people as well as balanced the multiplayer out a lot more its much more fun to play now. Plus they added a picture to show what killed you on the death screen which is very welcome.
UBER GOOBER you should download the Hostage Negotiation DLC its the best one so far and achievements are not half as bad as the first one. Only one that I didn't get in first hour of playing is the Intimidation Mask... still don't have it nearly 8-10 hours later still don't have it. People just don't reload in combat that often.. if at all.