Index: wp-admin/includes/update.php
===================================================================
--- wp-admin/includes/update.php	(revision 32466)
+++ wp-admin/includes/update.php	(working copy)
@@ -42,7 +42,7 @@
 	$updates = $from_api->updates;
 	$result = array();
 	foreach ( $updates as $update ) {
-		if ( $update->response == 'autoupdate' )
+		if ( $update->response == 'autoupdate' || ! $update->current)
 			continue;
 
 		if ( array_key_exists( $update->current . '|' . $update->locale, $dismissed ) ) {