947dc8d33d25540fbb8c9061c2b27b402008116f
Should help with this issue, reported here: http://www.bulletphysics.com/Bullet/phpBB3/viewtopic.php?f=9&t=1601 We can optionally leave out the 'clearForces'. Thanks everyone for the discussion.
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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