message: Invert normal sign on ghost faces.
diff: @@ -53,6 +53,10 @@ static void GetSigns(const FiniteElementSpace &fes, const FaceType type,
  signs[f_ind] = false;
  }
  }
  + if (info.IsGhost()) // Ghost faces are inverted...
  + {
  + signs[f_ind] = !signs[f_ind];
  + }
  f_ind++;
  }
  }
  