Index: wp-includes/functions-post.php
===================================================================
--- wp-includes/functions-post.php	(revision 3321)
+++ wp-includes/functions-post.php	(working copy)
@@ -136,8 +136,8 @@
 			post_name = '$post_name',
 			to_ping = '$to_ping',
 			pinged = '$pinged',
-			post_modified = '$post_date',
-			post_modified_gmt = '$post_date_gmt',
+			post_modified = '".current_time('mysql')."',
+			post_modified_gmt = '".current_time('mysql',1)."',
 			post_parent = '$post_parent',
 			menu_order = '$menu_order'
 			WHERE ID = $post_ID");