My solution which worked on our test machine was taken from this thread:

http://thread.gmane.org/gmane.comp.sysutils.backup.bacula.general/41042

steps i made:
stop bacula-director services
sudo -u postgres pg_dump bacula > pg_dump-bacula.sql
sudo -u postgres dropdb bacula
sudo -u postgres createdb bacula --owner=bacula

change client encoding in the dump file from UTF-8 to SQL_ASCII

psql -u bacula -h localhost -W bacula < pg_dump-bacula.sql
restart service

@arno lehmann:
For disabling batch mode I have read that this will decrease db write 
performance a lot.

Regards,

Gunnar


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