Index: wp-admin/edit-form-advanced.php
===================================================================
--- wp-admin/edit-form-advanced.php	(revision 6736)
+++ wp-admin/edit-form-advanced.php	(working copy)
@@ -133,7 +133,7 @@
 else
 	$time = __('Saved on:<br />%1$s at %2$s');
 ?>
-<p><?php printf($time, mysql2date(get_option('date_format'), $post->post_date), mysql2date(get_option('time_format'), $post->post_date)); ?>
+<p><?php printf($time, mysql2date(get_option('date_format'), $post->post_modified), mysql2date(get_option('time_format'), $post->post_modified)); ?>
 <?php endif; ?>
 </div>
 
Index: wp-admin/edit-page-form.php
===================================================================
--- wp-admin/edit-page-form.php	(revision 6736)
+++ wp-admin/edit-page-form.php	(working copy)
@@ -98,7 +98,7 @@
 else
 	$time = __('Saved on:<br />%1$s at %2$s');
 ?>
-<p><?php printf($time, mysql2date(get_option('date_format'), $post->post_date), mysql2date(get_option('time_format'), $post->post_date)); ?>
+<p><?php printf($time, mysql2date(get_option('date_format'), $post->post_modified), mysql2date(get_option('time_format'), $post->post_modified)); ?>
 <?php endif; ?>
 </div>