Index: program/include/rcube_imap.php
===================================================================
--- program/include/rcube_imap.php	(revision 659cf14cdd8862a126b775392d59727a5e8a790b)
+++ program/include/rcube_imap.php	(revision 2b42838427c887c8704afd033e5f17172216f82f)
@@ -164,6 +164,7 @@
 
             // get server properties
-            if (!empty($this->conn->rootdir))
-                $this->set_rootdir($this->conn->rootdir);
+            $rootdir = $this->conn->getRootDir();
+            if (!empty($rootdir))
+                $this->set_rootdir($rootdir);
             if (empty($this->delimiter))
 	            $this->get_hierarchy_delimiter();