diff --git a/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.cpp b/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.cpp
index 5f93abbef..ee4640d9e 100644
--- a/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.cpp
+++ b/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.cpp
@@ -19,10 +19,11 @@ subject to the following restrictions:
 #include "BulletCollision/CollisionShapes/btStridingMeshInterface.h"
 
 
-btConvexTriangleMeshShape ::btConvexTriangleMeshShape (btStridingMeshInterface* meshInterface)
+btConvexTriangleMeshShape ::btConvexTriangleMeshShape (btStridingMeshInterface* meshInterface, bool calcAabb)
 :m_stridingMesh(meshInterface)
 {
-	recalcLocalAabb();
+	if ( calcAabb )
+		recalcLocalAabb();
 }
 
 
diff --git a/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.h b/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.h
index 57dcff16a..01eecf278 100644
--- a/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.h
+++ b/src/BulletCollision/CollisionShapes/btConvexTriangleMeshShape.h
@@ -14,7 +14,7 @@ class btConvexTriangleMeshShape : public btPolyhedralConvexShape
 	class btStridingMeshInterface*	m_stridingMesh;
 
 public:
-	btConvexTriangleMeshShape(btStridingMeshInterface* meshInterface);
+	btConvexTriangleMeshShape(btStridingMeshInterface* meshInterface, bool calcAabb = true);
 
 	class btStridingMeshInterface*	getMeshInterface()
 	{
@@ -53,3 +53,4 @@ public:
 #endif //CONVEX_TRIANGLEMESH_SHAPE_H
 
 
+
diff --git a/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp b/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp
index 4c9dd08fc..a67f79b81 100644
--- a/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp
+++ b/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp
@@ -132,6 +132,37 @@ void btPolyhedralConvexShape::getAabb(const btTransform& trans,btVector3& aabbMi
 void	btPolyhedralConvexShape::recalcLocalAabb()
 {
 	m_isLocalAabbValid = true;
+	
+	#if 1
+	static const btVector3 _directions[] =
+	{
+		btVector3( 1.,  0.,  0.),
+		btVector3( 0.,  1.,  0.),
+		btVector3( 0.,  0.,  1.),
+		btVector3( -1., 0.,  0.),
+		btVector3( 0., -1.,  0.),
+		btVector3( 0.,  0., -1.)
+	};
+	
+	btVector3 _supporting[] =
+	{
+		btVector3( 0., 0., 0.),
+		btVector3( 0., 0., 0.),
+		btVector3( 0., 0., 0.),
+		btVector3( 0., 0., 0.),
+		btVector3( 0., 0., 0.),
+		btVector3( 0., 0., 0.)
+	};
+	
+	batchedUnitVectorGetSupportingVertexWithoutMargin(_directions, _supporting, 6);
+	
+	for ( int i = 0; i < 3; ++i )
+	{
+		m_localAabbMax[i] = _supporting[i][i] + m_collisionMargin;
+		m_localAabbMin[i] = _supporting[i + 3][i] - m_collisionMargin;
+	}
+	
+	#else
 
 	for (int i=0;i<3;i++)
 	{
@@ -143,6 +174,8 @@ void	btPolyhedralConvexShape::recalcLocalAabb()
 		tmp = localGetSupportingVertex(vec);
 		m_localAabbMin[i] = tmp[i]-m_collisionMargin;
 	}
+	#endif
 }
 
 
+
diff --git a/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp b/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp
index 633c204d9..744ed4b88 100644
--- a/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp
+++ b/src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp
@@ -489,6 +489,12 @@ void	btDiscreteDynamicsWorld::updateActivationState(btScalar timeStep)
 				{
 					if (body->getActivationState() == ACTIVE_TAG)
 						body->setActivationState( WANTS_DEACTIVATION );
+					if (body->getActivationState() == ISLAND_SLEEPING) 
+					{
+						body->setAngularVelocity(btVector3(0,0,0));
+						body->setLinearVelocity(btVector3(0,0,0));
+					}
+
 				}
 			} else
 			{