two minor changes, hopefully before release:

- reset randseed, which should make simulations more predictable
- re-activate substeps (for more accurate simulations)

extern/bullet2/src/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp

@@ -104,6 +104,7 @@ bool  MyContactDestroyedCallback(void* userPersistentData)
 
 btSequentialImpulseConstraintSolver3::btSequentialImpulseConstraintSolver3()
 {
+	btSeed2 = 0;
 	setSolverMode(SOLVER_RANDMIZE_ORDER);
 }
 
@@ -111,6 +112,8 @@ btSequentialImpulseConstraintSolver3::btSequentialImpulseConstraintSolver3()
 btSequentialImpulseConstraintSolver::btSequentialImpulseConstraintSolver()
 :m_solverMode(SOLVER_USE_WARMSTARTING)
 {
+		btSeed2 = 0;
+
 	gContactDestroyedCallback = &MyContactDestroyedCallback;
 
 	//initialize default friction/contact funcs

source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp

@@ -458,8 +458,12 @@ bool	CcdPhysicsEnvironment::proceedDeltaTime(double curTime,float timeStep)
 		ctrl->SynchronizeMotionStates(timeStep);
 	}
 
-	m_dynamicsWorld->stepSimulation(timeStep,0);//perform always a full simulation step
-	
+	float subStep = timeStep / float(m_numTimeSubSteps);
+	for (i=0;i<m_numTimeSubSteps;i++)
+	{
+		m_dynamicsWorld->stepSimulation(subStep,0);//perform always a full simulation step
+	}
+
 	numCtrl = GetNumControllers();
 	for (i=0;i<numCtrl;i++)
 	{