Index: wp-includes/css/media-views.css
===================================================================
--- wp-includes/css/media-views.css	(revision 22868)
+++ wp-includes/css/media-views.css	(working copy)
@@ -1017,7 +1017,7 @@
 
 .media-selection .attachments {
 	display: inline-block;
-	height: 60px;
+	height: 50px;
 	margin-top: 5px;
 	overflow: hidden;
 	vertical-align: top;