diff --git a/Demos/VehicleDemo/VehicleDemo.cpp b/Demos/VehicleDemo/VehicleDemo.cpp
index 3441eb195..c4e1f41e1 100644
--- a/Demos/VehicleDemo/VehicleDemo.cpp
+++ b/Demos/VehicleDemo/VehicleDemo.cpp
@@ -135,7 +135,7 @@ btTransform tr;
 tr.setIdentity();
 
 //either use heightfield or triangle mesh
-//#define  USE_TRIMESH_GROUND 1
+#define  USE_TRIMESH_GROUND 1
 #ifdef USE_TRIMESH_GROUND
 	int i;
 
@@ -145,8 +145,8 @@ const float TRIANGLE_SIZE=20.f;
 	int vertStride = sizeof(btVector3);
 	int indexStride = 3*sizeof(int);
 
-	const int NUM_VERTS_X = 50;
-	const int NUM_VERTS_Y = 50;
+	const int NUM_VERTS_X = 20;
+	const int NUM_VERTS_Y = 20;
 	const int totalVerts = NUM_VERTS_X*NUM_VERTS_Y;
 	
 	const int totalTriangles = 2*(NUM_VERTS_X-1)*(NUM_VERTS_Y-1);
diff --git a/Extras/ConvexDecomposition/ConvexDecomposition.h b/Extras/ConvexDecomposition/ConvexDecomposition.h
index 0e5db4132..85bd74355 100644
--- a/Extras/ConvexDecomposition/ConvexDecomposition.h
+++ b/Extras/ConvexDecomposition/ConvexDecomposition.h
@@ -150,7 +150,7 @@ namespace ConvexDecomposition
 	class ConvexDecompInterface
 	{
 	public:
-
+		virtual ~ConvexDecompInterface() {};
 		virtual void ConvexDebugTri(const float *p1,const float *p2,const float *p3,unsigned int color) { };
 		virtual void ConvexDebugPoint(const float *p,float dist,unsigned int color) { };
 		virtual void ConvexDebugBound(const float *bmin,const float *bmax,unsigned int color) { };
diff --git a/Extras/Jamfile b/Extras/Jamfile
index 8b24b18dd..612d393f1 100644
--- a/Extras/Jamfile
+++ b/Extras/Jamfile
@@ -4,7 +4,7 @@ SubInclude TOP Extras ConvexDecomposition ;
 SubInclude TOP Extras COLLADA_DOM ;
 SubInclude TOP Extras LibXML ;
 SubInclude TOP Extras BulletColladaConverter ;
-SubInclude TOP Extras BulletMultiThreaded ;
+#SubInclude TOP Extras BulletMultiThreaded ;
 #SubInclude TOP Extras EPA ;
 #SubInclude TOP Extras ExtraSolid35 ;
 SubInclude TOP Extras quickstep ;
@@ -12,4 +12,4 @@ SubInclude TOP Extras AlternativeCollisionAlgorithms ;
 SubInclude TOP Extras GIMPACT ;
 SubInclude TOP Extras GIMPACTUtils ;
 #GPUphysics needs 'make', not jam compatible build yet:
-SubInclude TOP Extras GPUphysics ;
+#SubInclude TOP Extras GPUphysics ;