Index: /trunk/roundcubemail/program/include/rcube_imap_cache.php
===================================================================
--- /trunk/roundcubemail/program/include/rcube_imap_cache.php	(revision 5356)
+++ /trunk/roundcubemail/program/include/rcube_imap_cache.php	(revision 5357)
@@ -854,5 +854,5 @@
         if ($is_thread) {
             // check messages number...
-            if ($mbox_data['EXISTS'] != @max(array_keys($index['depth']))) {
+            if (!$this->skip_deleted && $mbox_data['EXISTS'] != @max(array_keys($index['depth']))) {
                 return false;
             }