[gollem] WebDAV and Gollem 2 not working here ...

[mkrause at biochem.mpg.de]

Dear list,

i have a recent Horde 4 installation running and configured (among  
others) Gollem 2 with a samba share as backend.
Using Gollem via the web interface works really great (many thanks  
here to all ho worked on this!).
Now I want to access this using WebDAV which I tried to do from  
Windows 7 and Mac OS X using Safari and Cyberduck. When using the URL  
https://<hordeserver>/rpc.php/gollem I do not see any files but the  
following error messages in the Horde logfile:

------->8-------[horde.log]
2011-11-16T13:38:03+01:00 NOTICE: HORDE [gollem] PHP ERROR: Undefined  
variable: backends [pid 12519 on line 44 of  
"/srv/www/horde/gollem/lib/Api.php"]
2011-11-16T13:38:03+01:00 WARN: HORDE [gollem] PHP ERROR: Invalid  
argument supplied for foreach() [pid 12519 on line 44 of  
"/srv/www/horde/gollem/lib/Api.php"]
-------8<-------


How can I fix this?
Is this the correct way to access Gollem shares via WebDAV (or is this  
possible at all?)
Does anyone have WebDAV with Gollem 2 in Horde 4 running?


The Gollem SMB configuration (in backends.local.php) is:

------->8-------[gollem/config/backends.local.php]
<?php
$backends['smb_home'] = array(
     'disabled' => false,
     'name' => 'My Home',
     'driver' => 'smb',
     'hordeauth' => true,
     'params' => array(
         'hostspec' => 'samba-home-' . $GLOBALS['registry']->getAuth(),
         'port' => 139,
         'share' => $GLOBALS['registry']->getAuth(),
         'smbclient' => '/usr/bin/smbclient',
     ),
     'loginparams' => array(
     ),

     'attributes' => array(
         'type',
         'name',
         'edit',
         'download',
         'modified',
         'size'
     )
);
-------8<-------


Thanks in advance for any help!

cheers,
    Markus