57fb21879b4c218779f44f0332ca6a997c52a060
Thanks to Martijn Reuvers for bringing this up, and reproduction case. See issue here: http://code.google.com/p/bullet/issues/detail?id=177
Bullet is a 3D Collision Detection and Rigid Body Dynamics Library for games and animation. Free for commercial use, including Playstation 3, open source under the ZLib License. Discrete and continuous collision detection, integrated into Blender 3D, and COLLADA 1.4 Physics import. See the Bullet_User_Manual.pdf for more info and visit the Bullet Physics Forum at http://bulletphysics.com
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