1. How to deal with error handlers -- see my previous message.
2. Change in Fortran binding for MPI_FREE_MEM. Two people objected to it,
and nobody expressed support for it. Thus, unless I hear soon support for
the change, I shall revert to the previous binding, which is what we voted
officially on. I don't think that the issue is very important, although I
would have prefered more consistency between C and Fortran.