Hello,
I had a problem with Lotus Notes IMAP folders prefix - \".
I did some quick fix to rcube_imap.php, but it's not so correct. Plugin would be better.
Fix: rcube_imap.php(line:2528 )
function ltriml(&$item, $key){
$item = ltrim($item, '\\" ');
}
array_walk($a_folders, 'ltriml');