BUG #7818: Foreign server not visible under normal users

The following bug has been logged on the website:

Bug reference: 7818
Logged by: Alberto Brosich
Email address: abrosich(at)ogs(dot)trieste(dot)it
PostgreSQL version: 9.2.2
Operating system: Debian GNU/Linux 7.0
Description:

I installed oracle_fdw (version 0.9.8).
Under "postgres" user works all fine and I can create tables and select from
them.
Despite the fact that I granted usage to a normal user (as specified in the
documentation, with the command "GRANT USAGE ON FOREIGN SERVER server TO
pguser;")
, that user cannot see the server: \des gives an empty list and every
command about foreign server gives an error (for example CREATE USER
MAPPING...).
Postgresql is installed from PGDG apt repository.