Duplicate in pg_user table

Hi

Currently we are running Postgresql v7.3.2 on Redhat Linux OS v9.0. We have
Windows2000 client machines inserting records into the Postgresql tables
via the Postgres ODBC v7.3.0100.

After a few weeks of usage, when we do a \d at the sql prompt, there was a
duplicate object name in the same schema, ie it can be a duplicate row of
index or table.

When we do a \d table_name, it will show a duplication of column names
inside the table.

We discovered that the schema in the pg_user table was duplicated also;
thus causing the pg_dump to fail.

Thank you,
REgards.