Index: wp-content/themes/twentytwelve/style.css
===================================================================
--- wp-content/themes/twentytwelve/style.css	(revision 21334)
+++ wp-content/themes/twentytwelve/style.css	(working copy)
@@ -967,6 +967,7 @@
 	display: block;
 	margin: 0 0 24px;
 	margin: 0 0 1.714285714rem;
+	line-height: 1.714285714;
 }
 .entry-content img.alignleft {
 	margin: 12px 24px 12px 0;