It says it enhances collision detection - cool - Do you know what that means/does?
I don't know the inner workings, but I guess it improves collision detection for fast moving physics objects, perhaps makes more checks per frame or something like that.
Make sure you don't change position or angle of physics objects directly (by actions like Set Angle or Set Position), and you don't use other behaviors like Bullet or Rotate. Physics objects should only be controlled with physics actions.