diff --git a/Demos/ConcaveConvexcastDemo/ConcaveConvexcastDemo.cpp b/Demos/ConcaveConvexcastDemo/ConcaveConvexcastDemo.cpp
index e967014cc..d0bc6a70a 100644
--- a/Demos/ConcaveConvexcastDemo/ConcaveConvexcastDemo.cpp
+++ b/Demos/ConcaveConvexcastDemo/ConcaveConvexcastDemo.cpp
@@ -200,8 +200,13 @@ public:
 		btScalar m[16];
 		T.getOpenGLMatrix (&m[0]);
 		glPushMatrix ();
+#ifdef BT_USE_DOUBLE_PRECISION
+		glMultMatrixd (&m[0]);
+			glScaled (2.0 * boxShapeHalfExtents[0], 2.0 * boxShapeHalfExtents[1], 2.0 * boxShapeHalfExtents[2]);
+#else
 			glMultMatrixf (&m[0]);
 			glScalef (2.0 * boxShapeHalfExtents[0], 2.0 * boxShapeHalfExtents[1], 2.0 * boxShapeHalfExtents[2]);
+#endif //BT_USE_DOUBLE_PRECISION
 			glutSolidCube (1.0);
 		glPopMatrix ();
 	}
diff --git a/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.cpp b/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
index 964348f59..8d324d1bc 100644
--- a/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
+++ b/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.cpp
@@ -99,7 +99,7 @@ void SpuRaycastTaskProcess::issueTask2()
 	}
 }
 
-void SpuRaycastTaskProcess::addWorkToTask(SpuRaycastTaskWorkUnit workunit)
+void SpuRaycastTaskProcess::addWorkToTask(SpuRaycastTaskWorkUnit& workunit)
 {
 	m_spuRaycastTaskDesc[m_currentTask].workUnits[m_currentWorkUnitInTask] = workunit;
 	m_currentWorkUnitInTask++;
diff --git a/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.h b/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.h
index 42d7f1222..31b03515e 100644
--- a/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.h
+++ b/Extras/BulletMultiThreaded/SpuRaycastTaskProcess.h
@@ -61,7 +61,7 @@ public:
 	void initialize2(void* spuCollisionObjectsWrappers, int numSpuCollisionObjectWrappers);
 
 	/// batch up additional work to a current task for SPU processing. When batch is full, it issues the task.
-	void addWorkToTask(struct SpuRaycastTaskWorkUnit);
+	void addWorkToTask(struct SpuRaycastTaskWorkUnit&);
 
 	/// call flush to submit potential outstanding work to SPUs and wait for all involved SPUs to be finished
 	void flush2();
diff --git a/src/BulletCollision/CollisionShapes/btShapeHull.cpp b/src/BulletCollision/CollisionShapes/btShapeHull.cpp
index a04baf0af..a2be1eb73 100644
--- a/src/BulletCollision/CollisionShapes/btShapeHull.cpp
+++ b/src/BulletCollision/CollisionShapes/btShapeHull.cpp
@@ -100,7 +100,8 @@ btShapeHull::buildHull (btScalar margin)
 	}
 
 	btVector3 supportPoints[NUM_UNITSPHERE_POINTS+MAX_PREFERRED_PENETRATION_DIRECTIONS*2];
-	for (int i = 0; i < numSampleDirections; i++)
+	int i;
+	for (i = 0; i < numSampleDirections; i++)
 	{
 		supportPoints[i] = m_shape->localGetSupportingVertex(btUnitSpherePoints[i]);
 	}
@@ -108,9 +109,23 @@ btShapeHull::buildHull (btScalar margin)
 	HullDesc hd;
 	hd.mFlags = QF_TRIANGLES;
 	hd.mVcount = numSampleDirections;
-	hd.mVertices = &supportPoints[0][0];
-	hd.mVertexStride = sizeof (btVector3);
 
+#ifdef BT_USE_DOUBLE_PRECISION
+	float* tmpVerts = new float[numSampleDirections*3];
+	
+	for (i=0;i<numSampleDirections;i++)
+	{
+		tmpVerts[i*3] = supportPoints[i].getX();
+		tmpVerts[i*3+1] = supportPoints[i].getY();
+		tmpVerts[i*3+2] = supportPoints[i].getZ();
+	}
+
+	hd.mVertices = tmpVerts;
+	hd.mVertexStride = 3*sizeof(float);//sizeof (btVector3);
+#else
+	hd.mVertices = &supportPoints[0];
+	hd.mVertexStride = sizeof (btVector3);
+#endif
 
 	HullLibrary hl;
 	HullResult hr;