It looks like the mesh is doubled where the black spots 'o death are. (Two poloygons on the same set of vertexes) Sometimes you can fix this by adding a simple color node to the displacement for the material and setting the displacement value very low, like 0.001 It amy also have to do with the crease angle settings. Set the crease angle to 180 (The old default) for the effected prop and see if it helps. Nerd3D