On Tue, 31 Aug 2010, Derek Gaston wrote:

> Well, that is odd then.  Because I'm sure that libMesh is passing in
> ghosted vectors (hmmm... maybe the residual (rhs) isn't ghosted by
> default?).

Actually, the only vectors which currently default to ghosted are
old_local_solution, older_local_solution in TransientSystems,
old_local_nonlinear_solution in unsteady DiffSystems, and
current_local_solution in any System.  But we pass solution and rhs to
the petsc nonlinear solver, and both of those are just plain parallel.
---
Roy

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