ERROR: Cannot delete items

[jarek]

Finally, I have zabbix-1.6 and Postgres-8.1 up and running. I can add and monitor items, but when I'm trying to delete Graph or Item I get this erros.
Whats wrong ?

[Aly]

There are problems with pgsql. I would suggest to get atleast frontend from pre 1.6.1 on page www.zabbix.com/developers.php.