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 Bullet Continuous Collision Detection and Physics Library
 Erwin Coumans
 
+2007 Jan 04
+	- fixed optimized AABB tree building: in some cases the tree building fails due to unbalanced trees, which generated stack overflow
+	
 2006 Dec 15
 	- added contribution to allow double precision collision detection/dynamics. Define BT_USE_DOUBLE_PRECISION in your project and libraries that include Bullet