[Dovecot] Unknown dict module: db

[Lars Stavholm]

Using dovecot-1.1beta1 I get "Unknown dict module: db"
when starting up dovecot. In dovecot.conf I've got the
"expire_dict = db:/var/lib/dovecot/expire.db" statement
in the plugin{} section. Aparently required when the
"expire" plugin is enabled. dovecot is built with
"--with-db" and db-devel is present at compile time.

Any ideas anyone?

Cheers
/Lars