Index: class.ux_t3lib_db.php
===================================================================
--- class.ux_t3lib_db.php	(revision 45954)
+++ class.ux_t3lib_db.php	(working copy)
@@ -1907,9 +1914,13 @@
 	 */
 	protected function _quoteOrderBy(array $orderBy) {
 		foreach ($orderBy as $k => $v) {
-			$orderBy[$k]['field'] = $this->quoteName($orderBy[$k]['field']);
-			if ($orderBy[$k]['table'] != '') {
-				$orderBy[$k]['table'] = $this->quoteName($orderBy[$k]['table']);
+			if($orderBy[$k]['table'] == '' && $v['field'] != '' && ctype_digit($v['field'])){
+				;
+			} else {
+				$orderBy[$k]['field'] = $this->quoteName($orderBy[$k]['field']);
+				if ($orderBy[$k]['table'] != '') {
+					$orderBy[$k]['table'] = $this->quoteName($orderBy[$k]['table']);
+				}
 			}
 		}
 		return $orderBy;