Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 11001)
+++ wp-admin/includes/template.php	(working copy)
@@ -1617,7 +1617,7 @@
 			$m_time = $page->post_date;
 			$time = get_post_time('G', true);
 
-			$time_diff = time() - $time;
+			$time_diff = strtotime(gmdate("Y-m-d H:i:s")) - $time;
 
 			if ( $time_diff > 0 && $time_diff < 24*60*60 )
 				$h_time = sprintf( __('%s ago'), human_time_diff( $time ) );