[Dovecot] dsync problem: Error: Can't rename mailbox INBOX

[Jan Binder]

Am Donnerstag 17 Februar 2011, 17:14:45 schrieb Timo Sirainen:
> On Thu, 2011-02-17 at 14:25 +0100, Jan Binder wrote:
> > dsync-local(jan.binder): Error: Can't rename mailbox INBOX to
> > INBOX_a432bf2eca595a4dba47000043b078f4: Renaming INBOX isn't supported.
> > dsync-local(jan.binder): Error: Can't rename mailbox
> > INBOX_e184273887675a4dcc5b00000c16d079 to INBOX: Target mailbox already
> > exists
> 
> Syncing INBOX is a bit weak point with dsync currently. Basically the
> problem is that the local and remote INBOX has a different mailbox GUID,
> so dsync treats them as different mailboxes that have a naming conflict.
> The usual way to resolve this by renaming doesn't work, because INBOX
> can't be renamed.
> 
> You should be able to solve this by deleting the INBOX manually from the
> other side and letting dsync create it again with the proper GUID. What
> mailbox format do you use? I don't see mail_location in your settings.

Ok. deleting INBOX doesn't make dsync work:
dsync-local(jan.binder): Error: Can't rename mailbox INBOX to INBOX_a432bf2eca595a4dba47000043b078f4: Renaming INBOX isn't supported.

I deleted the INBOX folder on the machine where the dsync command is run from and after the failed sync it still does not exist.

Does my problem have anything to do with the maildir++ storage format specifically?
There doesn't seem to be any documentation on what works and what doesn't work.