Index: includes/Title.php
===================================================================
--- includes/Title.php	(revision 29606)
+++ includes/Title.php	(working copy)
@@ -2356,7 +2356,7 @@
 		$dbw = wfGetDB( DB_MASTER );
 		$categorylinks = $dbw->tableName( 'categorylinks' );
 		$sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
-			" WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
+			", cl_timestamp=cl_timestamp WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
 			" AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 		$dbw->query( $sql, 'SpecialMovepage::doSubmit' );