Index: src/wp-includes/css/media-views.css
===================================================================
--- src/wp-includes/css/media-views.css	(revision 26742)
+++ src/wp-includes/css/media-views.css	(working copy)
@@ -700,11 +700,13 @@
 	overflow: hidden;
 }
 
+/* @noflip */
 .attachment .thumbnail img {
 	top: 0;
 	left: 0;
 }
 
+/* @noflip */
 .attachment .thumbnail .centered {
 	position: absolute;
 	top: 0;