Guido Barosio <gbarosio(at)gmail(dot)com> writes:
> [ a whole lot of handwaving with no specifics ]
You need to be *way* more specific than that. Show us exactly what you
did and exactly what error messages you got, not your guesses about
what it means. Copy-and-paste is your friend.
You might find it helpful to read the reporting guidelines at
http://www.postgresql.org/docs/7.4/static/bug-reporting.html
Whether it's a postgres bug or not, those guidelines are good to
follow to make sure you've explained your problem in adequate detail.
regards, tom lane