[ODE] Tri-mesh example moving_trimesh

[Tristan McMillan]

Hi

I've just loaded ODE version 0.6 and OPCODE, however when I run the
moving tri-mesh example the tri-mesh objects fall through the ground and
don't behave like the normal geometric shapes.

Is the tri-mesh suppose to react like this and not collide with the
ground.

Thanks
Tristan