Comment 4 for bug 1155271

I guess this bug also affects mesh moving facility in
  dolfin/ale/*
  dolfin/mesh/MeshSmoothing
  something else ?

I guess something like
  mesh.intersection_operator().clear();
should be added to the end of every routine which moves mesh by writing to array
  std::vector<double>& x = mesh.geometry().x();
(which they do)