inbox parameter is ignored within location config for public namespaces?

[Dieter Knopf]

Hello,

i already asked a similiar question some month ago but still have no
fix for my problem :-(

This is my global location option in 10-mail.conf:
mail_location =
maildir:/home/vmail/%d/%n/MAILDIR:INBOX=/home/vmail/%d/%n/MAILDIR/.INBOX:INDEX=/home/vmail/%d/%n/INDEX/

This works fine, until i'm using a public namespace.

The following namespace is a normal user too, every mail to bos at foo.eu
is stored in /home/vmail/foo.eu/bos/MAILDIR (within the INBOX-folder)
and this directory is used for the location of the namespace.

Config:
namespace {
  type = public
  separator = /
  prefix = BOS/
  location = maildir:/home/vmail/foo.eu/bos/MAILDIR:INBOX=/home/vmail/foo.eu/bos/MAILDIR/.INBOX:INDEX=/home/vmail/foo.eu/bos/S_INDEX:INDEXPVT=/home/vmail/foo.eu/bos/S_INDEXPVT/%u
  subscriptions = yes
}

The namespace itself works fine and without a problem, but the INBOX
folder is the main problem. Mail users agents like Thunderbird now
shows a folder structure like:

BOS (grey, not useable)
- INBOX (the .INBOX folder)
- Other folder 1
- Other folder 2
- Other folder 3

The INBOX-config works fine for every single user, but it don't work
on namespaces? Is this a bug?

Thanks

Dieter