Hello, im just reporting, maybe it will help to solve something else for you!
There is some unmanaged error in bullet handle. Im using only public access functions, so there shouldnt be the error like this. 
[Fault] exception, information=RangeError: Error #1125: The index 1986948931 is out of range 1176.
Caused by (AWPDynamicsWorld.as:318):
bullet.stepMethod(timeStep, maxSubSteps, fixedTimeStep);
And my stepping code is following(AnimationTest:505):
_dynamicWorld.step(1/5,1,1/5);
This error i got in plenty, a lot of times.
Attached also my test project ‘AnimationTest’, in order to run it, you have to put “object.obj/mtl” files on the server. And also in class ‘AWPRigidBody’ you must add temporary property:
public var division:uint = 0;
If you have any questions, i will try to help.
I got this error by shooting ball (Pressing Enter).
+ I used the newest version that was possible, debug line shows:
version: AwayPhysics v0.68 (23-11-2011)
+ away3d_4_0_0
