contrib/lo and restoring databases

I'm dumping unrestoreable databases when I use the 'lo' type from
contrib/lo:

lo_test=# select version();
                           version
-------------------------------------------------------------
 PostgreSQL 7.3.2 on i686-pc-linux-gnu, compiled by GCC 2.96

I'm using contrib/lo because the front-end application is MS Access
(boo hiss) and the ODBC driver requires the 'lo' type in order to use
large objects.  However, I can reproduce the problem without involving
Access in any way.

Here's what happens:

issue_track=# \c lo_test;
You are now connected to database lo_test.
lo_test=# create table foo (id serial, object lo);
NOTICE:  CREATE TABLE will create implicit sequence 'foo_id_seq' for SERIAL column 'foo.id'
CREATE TABLE
lo_test=# \lo_import /home/netops/tmp/DNS-posture-1.0.pdf
lo_import 20578
lo_test=# insert into foo (object) values (20578::oid::lo);
INSERT 20579 1
lo_test=# select * from foo;
 id | object
----+--------
  1 | 20578
(1 row)

lo_test=# select distinct loid from pg_largeobject
lo_test-# ;
 loid
-------
 20578
(1 row)

All well and good so far.  I want to make sure I can dump and restore
the database so I do:

bash-2.05a$ pg_dump -Fc -b lo_test >lo_test.dump
bash-2.05a$ createdb -T template0 lo_test2
CREATE DATABASE
bash-2.05a$ pg_restore -v -d lo_test2 < lo_test.dump
pg_restore: connecting to database for restore
pg_restore: creating FUNCTION lo_in (cstring)
pg_restore: NOTICE:  ProcedureCreate: type lo is not yet defined
pg_restore: creating FUNCTION lo_out (lo)
pg_restore: NOTICE:  Argument type "lo" is only a shell
pg_restore: creating TYPE lo
pg_restore: creating FUNCTION lo_oid (lo)
pg_restore: creating FUNCTION oid (lo)
pg_restore: creating CAST oid (public.lo)
pg_restore: [archiver (db)] could not execute query: ERROR:  parser: parse error at or near "." at character 132
pg_restore: *** aborted because of error

This looks like a bug in pg_dump or pg_restore to me.  I can supply
the dump file if that would be helpful (it's about 100K).

-Doug