pg_dumpall failing from possible corrupted shared memory

I am trying to perform a complete dump of my database. However, I am getting an error when
pg_dumpall reaches one particular database. I reformatted the text so that it wouldn't get
chopped to pieces after it is sent.

Here is the output from pg_dumpall:

postgres(at)db_server01~ $ pg_dumpall > test.dump
pg_dump: SQL command 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:
SELECT t.tableoid,
t.oid,
t.relname as indexname,
pg_catalog.pg_get_indexdef(i.indexrelid) as indexdef,
t.relnatts as indnkeys,
i.indkey,
i.indisclustered,
c.contype,
c.conname,
c.tableoid as contableoid,
c.oid as conoid,
(SELECT spcname
FROM pg_catalog.pg_tablespace s
WHERE s.oid = t.reltablespace) as tablespace
FROM pg_catalog.pg_index i
JOIN pg_catalog.pg_class t
ON (t.oid = i.indexrelid)
LEFT JOIN pg_catalog.pg_depend d
ON (d.classid = t.tableoid
AND d.objid = t.oid
AND d.deptype = 'i')
LEFT JOIN pg_catalog.pg_constraint c
ON (d.refclassid = c.tableoid
AND d.refobjid = c.oid)
WHERE i.indrelid = '16737'::pg_catalog.oid
ORDER BY indexname
pg_dumpall: pg_dump failed on database "mydb", exiting

Here is the output from the logs when these errors occurs minus the repeated above query:

10-25 18:51:43 PDT% LOG: server process (PID 12899) was
terminated by signal 11
10-25 18:51:43 PDT% LOG: terminating any other active
server processes
10-25 18:51:43 PDT%postgres WARNING: terminating connection
because of crash of another server process
10-25 18:51:43 PDT%postgres 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.
10-25 18:51:43 PDT%postgres HINT:
In a moment you should be able to reconnect to the
database and repeat your command.
10-25 18:51:43 PDT% LOG: all server processes terminated;
reinitializing
10-25 18:51:43 PDT% LOG: database system was interrupted
at 2006-10-25 18:50:42 PDT
10-25 18:51:43 PDT% LOG: checkpoint record is at 0/8E2DBA08
10-25 18:51:43 PDT% LOG: redo record is at 0/8E2DBA08;
undo record is at 0/0; shutdown TRUE
10-25 18:51:43 PDT% LOG: next transaction ID: 168758;
next OID: 621178
10-25 18:51:43 PDT% LOG: next MultiXactId: 45;
next MultiXactOffset: 95
10-25 18:51:43 PDT% LOG: database system was not properly shut down;
automatic recovery in progress
10-25 18:51:43 PDT% LOG: record with zero length at 0/8E2DBA4C
10-25 18:51:43 PDT% LOG: redo is not required
10-25 18:51:43 PDT% LOG: database system is ready
10-25 18:51:43 PDT% LOG: transaction ID wrap limit is 1073790580,
limited by database "postgres"

Any help is appreciated.

Regards,

Richard Broersma Jr.