pg_dump error

Hi,

I just ran into an error from pg_dump:

/usr/local/pgsql/bin/pg_dump -F p my_db

pg_dump: ERROR: unexpected chunk number 3292 (expected 5) for toast value
144391872
pg_dump: SQL command to dump the contents of table "measured_bioassay_base"
failed: PQendcopy() failed.
pg_dump: Error message from server: ERROR: unexpected chunk number 3292
(expected 5) for toast value 144391872
pg_dump: The command was: COPY public.measured_bioassay_base (bioassay_id,
name, owner_id, writer_id, readers_id, is_deleted, delete_time, expt_id,
protocol_application_id, source_bioassay_id, filename, fileheader, format,
date_uploaded) TO stdout;

Any ideas whats happened here? It looks like one of my tables hasn't backed
up correctly. This table has a text field which contains large amounts of
data per field. The dump file is much smaller than last nights dump.

(PostgreSQL 7.4.8 on i686-pc-linux-gnu, compiled by GCC 2.95.4)

Thanks for any help

Adam

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