diff --git a/lib/permissions/permissionutil.inc.php b/lib/permissions/permissionutil.inc.php
index 3492d5e..b3358b5 100644
--- a/lib/permissions/permissionutil.inc.php
+++ b/lib/permissions/permissionutil.inc.php
@@ -454,11 +454,15 @@ class KTPermissionUtil {
         $aParams = array($oNewPO->getID(), $oOrigPO->getID(), $sFolderIDs);
         DBUtil::runQuery(array($sQuery, $aParams));
 
+        Folder::clearAllCaches();
+
         $sQuery = "UPDATE $default->documents_table SET
             permission_object_id = ? WHERE permission_object_id = ? AND
             parent_folder_ids LIKE ?";
         DBUtil::runQuery(array($sQuery, $aParams));
 
+        Document::clearAllCaches();
+
         // All objects using this PO must be new and must need their
         // lookups updated...
         KTPermissionUtil::updatePermissionLookupForPO($oNewPO);