pbs with pg_dump

Hi all,
Does anybody have ideas about the following ?

$> pg_dump -v hn_test7 > test.pgdump
--  saving database definition
--  last builtin oid is 18539
--  reading user-defined types
--  reading user-defined functions
--  reading user-defined aggregates
--  reading user-defined operators
--  reading user-defined tables
--  finding Triggers for relation: 'language'
--  finding Triggers for relation:
'languages_properties'

getTables(): SELECT (for VIEW DEFINITION) failed.
Explanation from backend: ERROR:  Function OID 1258
does not exist


This kind of error came when I upgrade from 7.1.2 to
7.1.3. Before that, pg_dump used to work perfectly
well...

I also cheked pg_dump for very simple db (under
7.1.3), and it works fine...

I work with SUSE Linux, and any hints to *easily*
upgrade to 7.2 are welcome too...

Regards,
Jeff.

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