> Operator commutator is itself, and when reading the ascii version
> of the dump (produced with -Fc) I see that this has been changed
> with what was probably it's oid instead.
Can you paste that ascii from the dump?
> Is this a bug in pg_dump ?
> How do I tell which pg_dump version produced the dump ?
I'm not sure it is possible. If it is, it will be at the very top of
the ascii version.
Chris