pg_dump causes postgres crash

Fairly new (less than a week) install.
"PostgreSQL 8.2.4 on i386-pc-solaris2.10, compiled by
GCC gcc (GCC) 3.4.3 (csl-sol210-3_4-branch+sol_rpath)"

database size around 43 gigabytes.

2 attempts at a pg_dump across the network caused the
database to go down...

The first time I thought it was because of mismatched
pg_dump (was version 8.0.X)...but the second time it
was definitely 8.2.4 version of pg_dump.

My first thought was corruption...but this database
has successfully seeded 2 slony subscriber nodes from
scratch as well running flawlessly under heavy load
for the past week.

Even more odd is that a LOCAL pg_dump (from on the
box) succeeded just fine tonight (after the second
crash).

Thoughts?

----First Crash-------

backup-srv2 prod_backup # time /usr/bin/pg_dump
--format=c --compress=9 --ignore-version
--username=backup --host=prod_server prod > x

pg_dump: server version: 8.2.4; pg_dump version:
8.0.13
pg_dump: proceeding despite version mismatch
pg_dump: WARNING: terminating connection because of
crash of another server process
DETAIL: The postmaster has commanded this server
process to roll back the current transaction and exit,
because another server process exited abnormally and
possibly corrupted shared memory.
HINT: In a moment you should be able to reconnect to
the database and repeat your command.
pg_dump: server closed the connection unexpectedly
This probably means the server terminated
abnormally
before or while processing the request.
pg_dump: SQL command to dump the contents of table
"access_logs" failed: PQendcopy() failed.
pg_dump: Error message from server: server closed the
connection unexpectedly
This probably means the server terminated
abnormally
before or while processing the request.
pg_dump: The command was: COPY public.access_logs (ip,
username, "action", date, params) TO stdout;

------Second Crash--------

backup-srv2 ~ # time /usr/bin/pg_dump --format=c
--compress=9 --username=backup --host=prod_server
prod | wc -l
pg_dump: Dumping the contents of table "audit" failed:
PQgetCopyData() failed.
pg_dump: Error message from server: server closed the
connection unexpectedly
This probably means the server terminated
abnormally
before or while processing the request.
pg_dump: The command was: COPY public.audit (audit_id,
entity_id, table_name, serial_id, audit_action,
when_ts, user_id, user_ip) TO stdout;

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