- Fix possible ambiguity in folders caching (when list_mailboxes() was called the same result was returned, no matter what was the 1st and 2nd argument)

program/include/rcube_imap.php

@@ -3049,11 +3049,13 @@ class rcube_imap
      */
     private function _list_mailboxes($root='', $name='*', $filter=null)
     {
-        $cache_key = 'mailboxes';
+        $cache_key = $root.':'.$name;
         if (!empty($filter)) {
-            $cache_key .= '.'.substr((is_string($filter) ? $filter : serialize($filter)), 0, 90);
+            $cache_key .= ':'.(is_string($filter) ? $filter : serialize($filter));
         }
 
+        $cache_key = 'mailboxes.'.md5($cache_key);
+
         // get cached folder list
         $a_mboxes = $this->get_cache($cache_key);
         if (is_array($a_mboxes)) {

program/steps/settings/folders.inc

@@ -231,7 +231,7 @@ function rcube_subscription_form($attrib)
     }
 
     // get folders from server
-    $IMAP->clear_cache('mailboxes');
+    $IMAP->clear_cache('/^mailboxes.*/', true);
 
     $a_unsubscribed = $IMAP->list_unsubscribed();
     $a_subscribed   = $IMAP->list_mailboxes();