[Dovecot] virtual plugin and shared namespace

[l.chelchowski at eurocar.pl]

Hi,

I have a problem with virtual plugin and geting mails form shared 
namespace.
dovecot-virtual:
----
Shared/*
Public/*
*
     unseen
----

dovecot.conf:
----
namespace {
   inbox = yes
   location =
   prefix =
   separator = /
   type = private
}
namespace {
   list = children
   location = 
maildir:/home/vmail/public/:CONTROL=/var/mail/vmail/%d/%u/control/public:INDEX=/var/mail/vmail/%d/%u/index/public:LAYOUT=fs
   prefix = Public/
   separator = /
   subscriptions = yes
   type = public
}
namespace {
   list = children
   location = maildir:%%h/:INDEX=/var/mail/vmail/%d/%u/index/shared/%%u
   prefix = Shared/%%u/
   separator = /
   subscriptions = no
   type = shared
}
namespace {
   list = children
   prefix = Virtual/
   separator = /
   location = virtual:~/virtual
}
----

When I enter the virtual mailbox Unread I get this debug info:
virtual mailbox Virtual/Unread: Skipping non-existing mailbox 
Shared/test at domain.pl/

Is it a bug or misconfig?
-- 
Łukasz Chełchowski