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http://www.continuousphysics.com/ftp/pub/test/index.php?dir=blender/&file=demos-2.42.zip patch by Charlie Carley (snailrose @ elysiun.com)
also, disabled the asynchronous logicbrick update, it reportedly causes jitter.
remove constraint fixed, Bullet timestep now subdivides Blender game engine timestep, so it runs 60 hertz, SphereShape reverted to old style, so no support for non-uniform scaled spheres for now,