Another update has been released for
Batman: Arkham Asylum. The patch addresses rigid bodies when using PhysX on a NVIDIA GeForce GTX 470 or GeForce GTX 480 video card. You'll only need to download this if you own a 470 or 480 card coming out. I've sent word asking if this is needed if you use another NVIDIA card as a dedicated PhysX card and will update once I get word. I have to say, playing
Batman using PhysX is pretty cool if you got the horsepower to do it.
-Update (John) - I just got word from NVIDIA that anyone using NVIDIA cards regardless should update it to fix the issue.