Compare the keys, not the values (which are objects).

diff --git a/imp/lib/Imap/Tree.php b/imp/lib/Imap/Tree.php
index 42c7eaa..01f0000 100644 (file)
--- a/imp/lib/Imap/Tree.php
+++ b/imp/lib/Imap/Tree.php
@@ -1114,7 +1114,7 @@ class IMP_Imap_Tree implements ArrayAccess
         $this->_initPollList();
 
         $plist = $prune
-            ? array_values(array_intersect(array_keys($this->_poll), $this->folderList()))
+            ? array_values(array_intersect(array_keys($this->_poll), array_keys($this->folderList())))
             : array_keys($this->_poll);
 
         if ($sort) {