--- /usr/local/src/typo3/typo3_src-4.2.6/t3lib/class.t3lib_loaddbgroup.php	2009-02-10 10:36:26.000000000 +0100
+++ class.t3lib_loaddbgroup.php	2010-05-13 02:44:13.000000000 +0200
@@ -821,7 +821,13 @@
 	 * @return	boolean		Returns true if looking from the symmetric ("other") side to the relation.
 	 */
 	function isOnSymmetricSide($parentUid, $parentConf, $childRec) {
-		return t3lib_div::testInt($childRec['uid']) && $parentConf['symmetric_field'] && $parentUid == $childRec[$parentConf['symmetric_field']]
+		$uidOfRelatedRecordInChildRecord = $childRec[$parentConf['symmetric_field']];
+		if(!intval($uidOfRelatedRecordInChildRecord)) {
+			$valueParts = t3lib_div::trimExplode('|',$uidOfRelatedRecordInChildRecord);
+			$itemParts = t3lib_div::revExplode('_', $valueParts[0], 2);
+			$uidOfRelatedRecordInChildRecord = intval($itemParts[1]);
+		}
+		return t3lib_div::testInt($childRec['uid']) && $parentConf['symmetric_field'] && $parentUid == $uidOfRelatedRecordInChildRecord
 			? true
 			: false;
 	}