PG 8.3beta3 Segmentation Fault during Database Restore

Hi folks,

I've been trying to test a backup/restore of our production database
(26GB on disk) using PG 8.2.4 as backup and PG 8.3beta3 for the restore.

FIRST TRY:
     pg_dump (v8.3beta3)  --format=c    the PG 8.2.4 database  .... OK
     pg_restore  into a brandnew PG 8.3beta3 database  ....
Segmentation fault after ~10min
     From the serverlog:
     2007-11-27 11:03:27 CET [7133] LOG:  server process (PID 7337)
was terminated by signal 11: Segmentation fault
     2007-11-27 11:03:27 CET [7235] CONTEXT:  COPY login_session,
line 9210986

SECOND TRY:
     Increased the loglevel to DEBUG1
     pg_dump (v8.2.4)  --format=p    the PG 8.2.4 database into an
ASCII file (31 GB)  .... OK
     psql-restore into a brandnew PG 8.3beta3 database  ....
Segmentation fault after ~2hours
     From the serverlog:
2007-11-27 15:56:38 CET [15833] STATEMENT:  CREATE INDEX
login_session_promotion_id ON login_session USING btree (promotion_id);
2007-11-27 15:56:38 CET [15833] ERROR:  concurrent insert in progress
2007-11-27 15:56:38 CET [15833] STATEMENT:  CREATE INDEX
login_session_web_site_id ON login_session USING btree (web_site_id);
2007-11-27 15:56:50 CET [21670] DEBUG:  autovacuum: processing
database "gaia"
2007-11-27 15:57:58 CET [15726] LOG:  server process (PID 15833) was
terminated by signal 11: Segmentation fault
2007-11-27 15:57:58 CET [15726] LOG:  terminating any other active
server processes

What could be the cause of this problem? Is it a bug or my fault?
The postgres.crash.log is enclosed.

Thanks,
Rudolf VanderLeeden
Logicunited GmbH
Germany
vanderleeden@logicunited.com