dovecot - Nov 2015 - bug in shared folders/lazy_expunge

Hi list,

I have a problem I was not able to resolve with my current setup (quite basic,
the relevant part appended [1]).
When userA shares a folder with userB then userB cannot access his mailbox.
It's the same problem others have mentioned in 
*) http://www.dovecot.org/list/dovecot/2014-August/097449.html
*) http://dovecot.org/pipermail/dovecot/2014-May/096355.html

Could we please have a fix? TIA

infoomatic


[1]
namespace {
  list = children
  location = mdbox:/var/lib/vmail/mail/%d/%%u
  prefix = shared/%%u/
  separator = /
  subscriptions = no
  type = shared
}
namespace expunged {
  hidden = yes
  list = no
  location =
mdbox:/var/lib/vmail/expunged/mail/%d/%u:INDEX=/var/lib/vmail/expunged/index/%d/%u:MAILBOXDIR=expunged
  prefix = .EXPUNGED/
  subscriptions = no
}
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
  separator = /
  type = private
}