Index: horde/lib/SyncML/Sync.php
===================================================================
--- horde.orig/lib/SyncML/Sync.php	2009-12-17 00:31:43.000000000 +0000
+++ horde/lib/SyncML/Sync.php	2010-02-09 20:29:19.000000000 +0000
@@ -597,6 +597,9 @@
     function _retrieveChanges($syncDB, &$adds, &$replaces, &$deletes)
     {
         $adds = $replaces = $deletes = array();
+        if ($syncDB == 'configuration') {
+            return;
+        }
         $result = $GLOBALS['backend']->getServerChanges($syncDB,
                                                         $this->_serverAnchorLast,
                                                         $this->_serverAnchorNext,