[horde] [imp] Namespace problem -> ActiveSync not working

[Pulz, Joerg]

Hi,

i've updated to the latest git (pulled from github) some minutes ago.
Apparently, the latest namespace changes seem to broke something.

In the WebUI, my Inbox no longer shows up as the topmost folder (right  
below the green "New Message" field) in the folder list, but in  
between all my other subfolders of my Inbox.
E.g.:
   New Message
   Drafts
   Sent
   Spam
   Templates
   --------------
   Folder Actions
   --------------
   folder_1
   folder_2
   INBOX
   other_folder_1
   other_folder_2

I can only reach/access my Inbox by clicking the "Mail" link in the  
upper menu bar.
Whenever i click on "INBOX" in the folder list, a red error box  
appears with the following text:
Could not open mailbox "INBOX.INBOX".

When i try to access my mailbox using my Android device using  
ActiveSync, i continuously see:
Waiting for sync - Your email will appear soon
but nothing happens.
I think this is not an ActiveSync problem but related to the latest  
namespace changes and the behavior i see in the IMP WebUI.

Here are two lines out of the horde log:
2014-05-30T00:23:44+02:00 WARN: HORDE [imp] [getSyncToken] IMAP error  
reported by server. [pid 52984 on line 721 of  
"/home/www/horde/imp/lib/Imap.php"]
2014-05-30T00:23:44+02:00 WARN: HORDE [imp] [openMailbox] Could not  
open mailbox "INBOX.INBOX". [pid 52984 on line 721 of  
"/home/www/horde/imp/lib/Imap.php"]

Can someone please take a look at it?
Any help or fix is much appreciated.

Kind regards
Joerg
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