Well seems Like I am talking to my self since it is 8:44pm 1/15/13 and I am the only one that has installed let alone tried it yet?
If you have Punk buster issues
Fix: open steam / go to LIBRARY / click on AMERICAS ARMY 3 / right click on AMERICAS ARMY 3 / click on PROPERTIES / then click on LOCAL FILES / now click on VERIFY INTEGRITY OF GAME CACHE….
Start the game und follow the instructions of installing DIRECTX and PB….
Now the Problem is fixed!!!!!!!!!