Index: /trunk/roundcubemail/program/include/rcube_imap.php
===================================================================
--- /trunk/roundcubemail/program/include/rcube_imap.php	(revision 5094)
+++ /trunk/roundcubemail/program/include/rcube_imap.php	(revision 5095)
@@ -3514,4 +3514,8 @@
     function mailbox_info($mailbox)
     {
+        if ($this->icache['options'] && $this->icache['options']['name'] == $mailbox) {
+            return $this->icache['options'];
+        }
+
         $acl       = $this->get_capability('ACL');
         $namespace = $this->get_namespace();
@@ -3574,4 +3578,6 @@
             $options['norename'] = $options['is_root'] || $options['namespace'] != 'personal';
         }
+
+        $this->icache['options'] = $options;
 
         return $options;