Index: horde/lib/SyncML/Backend.php
===================================================================
--- horde.orig/lib/SyncML/Backend.php	2009-12-17 00:31:43.000000000 +0000
+++ horde/lib/SyncML/Backend.php	2010-02-09 20:29:18.000000000 +0000
@@ -453,15 +453,16 @@
         $database = $this->_normalize($databaseURI);
 
         switch($database) {
-        case 'tasks';
-        case 'calendar';
-        case 'notes';
-        case 'contacts';
+        case 'tasks':
+        case 'calendar':
+        case 'notes':
+        case 'contacts':
+        case 'configuration':
             return true;
 
         default:
-            $this->logMessage('Invalid database ' . $database
-                              . '. Try tasks, calendar, notes or contacts.',
+            $this->logMessage('Invalid database "' . $database
+                              . '". Try tasks, calendar, notes or contacts.',
                               __FILE__, __LINE__, PEAR_LOG_ERR);
             return false;
         }