invalid types and tables

Hi all admins,

Even though I am new to postgres I have been given the job of administrator,
in at the deep end you might say.

We have a cron job that runs nightly to back up all of our users databases,
the output from the cron job shows the following WARNINGs

pg_dump: WARNING: owner of data type pga_queries appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557151 appears to be invalid
pg_dump: WARNING: owner of data type pga_forms appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557156 appears to be invalid
pg_dump: WARNING: owner of data type pga_scripts appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557161 appears to be invalid
pg_dump: WARNING: owner of data type pga_reports appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557166 appears to be invalid
pg_dump: WARNING: owner of data type pga_schema appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557171 appears to be invalid
pg_dump: WARNING: owner of data type pga_layout appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557176 appears to be invalid
pg_dump: WARNING: owner of data type adult_results appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557181 appears to be invalid
pg_dump: WARNING: owner of data type child_results appears to be invalid
pg_dump: WARNING: owner of data type pg_toast_557186 appears to be invalid
pg_dump: WARNING: owner of table "pga_queries" appears to be invalid
pg_dump: WARNING: owner of table "pga_forms" appears to be invalid
pg_dump: WARNING: owner of table "pga_scripts" appears to be invalid
pg_dump: WARNING: owner of table "pga_reports" appears to be invalid
pg_dump: WARNING: owner of table "pga_schema" appears to be invalid
pg_dump: WARNING: owner of table "pga_layout" appears to be invalid
pg_dump: WARNING: owner of table "adult_results" appears to be invalid
pg_dump: WARNING: owner of table "child_results" appears to be invalid
pg_dump: WARNING: owner of data type trigger appears to be invalid

My two questions are:

1: How do I find out which owner is being referenced, when I look at a
number of user accounts (databases) they all appear to have pga_forms,
pga_reposts etc.

2: How do I display a list of the above mentioned types?

We are running version 7.2.3 (upgrading in the new year)

Thanks in advance for any assistance,

Regards,

Sandy Spence

Computer Officer, RA Certification Manager
Department of Computer Science - UWA
Llandinam Building
Penglais Campus
Aberystwyth
Ceredigion
Wales - UK
SY23 3DB
Tel: (01970)-622433
Fax: (01970)-628536