Fixed in git.

Changes have been made in Git for this ticket:

Use the new namespace handler (Bug #6691).

http://git.horde.org/diff.php/framework/Kolab_Storage/lib/Horde/Kolab/Storage/Driver.php?rt=horde-git&r1=75e12f34d697a0010aed459c02a186bead1c9998&r2=f52658e9ab1b5acf3c2d15f43a3d6f9994885022
http://git.horde.org/diff.php/framework/Kolab_Storage/lib/Horde/Kolab/Storage/Driver/Imap.php?rt=horde-git&r1=4a1bf5515c29fe3fa47ae19f5c8c733551ce6cbc&r2=f52658e9ab1b5acf3c2d15f43a3d6f9994885022

Thanks for the report. In fact this is freely configurable and "." or 
"/" are just the most common used delimiters. We should query the 
server upon connect which hierarchy separator is in use and save it in 
a variable. Though I guess this is more a low priority issue as the 
official Kolab servers uses "/" currently.

In some functions like getOwner() in lib/Horde/Share/kolab.php

or lib/Horde/Kolab.php

or lib/Horde/Kolab/IMAP.php



the folder-name is checked against a regular Expression:



if (!preg_match(";(shared\.|INBOX[/]?|user/([^/]+)/)([^@]+)(@.*)?;", 
$folder_path, $matches)



Some server are using "INBOX." and not "INBOX/". Would be great, if 
that bug could be fixed.



function getOwner()

     {



         // PATCHED



         if 
((!preg_match(";(shared\.|INBOX[/]?|user/([^/]+)/)([^@]+)(@.*)?;", 
$this->get('folder'), $matches)) && 
(!preg_match(";(shared\.|INBOX[.]?|user\.([^.]+)\.)([^@]+)(@.*)?;", 
$this->get('folder'), $matches)) ) {

                 return PEAR::raiseError(sprintf(_("Owner of folder %s 
cannot be determined."), $this->get('folder')));

         }



         if ((substr($matches[1], 0, 6) == 'INBOX/')|| 
(substr($matches[1], 0, 6) == 'INBOX.')) {

             return Auth::getAuth();

         } elseif ((substr($matches[1], 0, 5) == 'user/') || 
(substr($matches[1], 0, 5) == 'user.')) {

             $domain = strstr(Auth::getAuth(), '@');

             $user_domain = isset($matches[4]) ? $matches[4] : $domain;

             return $matches[2] . $user_domain;

         } elseif ($matches[1] == 'shared.') {

             return 'anonymous';

         }

     }