Postgres user lost its access

Hello,

suddenly I find that the postgres user no longer has permission to
create new users and databases.

What do I do? :) I haven't fiddled with it at all AFAIK, so I can't
imagine what triggered the problem.

I'm *about* to fiddle though. Any hints on making PostgreSQL secure in a
multi-user environment? I've read stuff about code running inside
PostgreSQL by default; and I've had it allow an arbitrary local user
create and drop databases. Is there an easy way to shut EVERYONE
except the postgres user out of EVERYTHING so that I can selectively
allow what I want to allow?

(And I promise, I wasn't experimenting with the latter when causing the
former :)).

--
/ Peter Schuller, InfiDyne Technologies HB

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