[Dovecot] rc28 : can't set quotas with userdb + passwd file

I'm using dovecot 1.0 rc28 - great software!

I have a virtual hosting setup, with passdb and userdb both using a passwd file.

I cannot get per-user quotas put in the relevant field of the userdb to work. They appear to be completely ignored; only the setting from /etc/dovecot.conf is applied.

Can anyone confirm that this is working for them? If it is, can you post the relevant bits of your configuration, please?

Many thanks.

Kind regards, David