[imp] trouble with quota imp 4.2

[Per olof Ljungmark]

After upgrade to Horde 3.2.1/imp 4.2 user imap quotas no longer shows. 
What really puzzles me is that on our test installation with same 
versions, same imap server (cyrus) and configs quotas shows in both imp 
and dimp.

Tried both "imap" and "hook" driver.

$servers['_Stranger'] = array(
     'name' => 'Stranger',
     'server' => 'stranger.inter-sonic.com',
     'hordeauth' => true,
     'protocol' => 'imap/tls/novalidate-cert',
     'port' => 143,
     'folders' => '',
     'namespace' => '',
     'maildomain' => '',
     'realm' => '',
     'preferred' => true,
     'quota' => array(
         'driver' => 'imap',
         'params' => array()
     ),
     'acl' => array(
         'driver' => 'rfc2086',
     ),
     'dotfiles' => false,
     'hierarchies' => array());

I'm out of ideas where to start debugging this...