Henk,
> Is there something special I should do in order to be able to use accented
> characters in text columns ?
If the accented characters are supported by the ASCII character set, then no.
If they are not, though, you may need to compile Postgres with unicode
support.
Also, make sure that you compiled Postgres on a machine set to the language
you are using, or stuff won't alpha-sort right.
--
-Josh Berkus
Aglio Database Solutions
San Francisco