dovecot - Oct 2013 - mailbox sharing with mdbox

Hello,

i want to know if it's possible to use mailbox sharing with mdbox.
I have done a setup with maildir where it's working fine but with mdbox
I'm only able to subscribe the shared folder but there are no messages in
it.
(maybe a problem with the namespace)

I'm running  dovecot 2.2.6 [deb http://xi.rename-it.nl/debian/
stable-auto/dovecot-2.2.patched main  ] on
Debian Wheezy 

Kind regards
Stefan