You have duplicate entries in pg_shadow/pg_user table.
>
> I'm using the postgresql-6.5.3-1 rpm from PostgreSQLs website on
> redhat 6.0
>
> Some time between yesterday and today postgres developed the habit of
> listing all may table twice when I do \d or \dS from psql. Right now
> this is only annoying, but does this mean there is a system corruption
> I need to fix?
>
> I've destroyed all my databases other than template1 and vacuumed in
> template1. My next thought is to reinstall, but I'd rather not if I
> don't have too.
>
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> 617.832.0332 (Fax: 617.956.2696)
>
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