Index: wp-content/themes/twentythirteen/style.css
===================================================================
--- wp-content/themes/twentythirteen/style.css	(revision 23621)
+++ wp-content/themes/twentythirteen/style.css	(working copy)
@@ -2323,6 +2323,7 @@
 
 #reply-title small a:hover {
 	color: #ed331c;
+	text-decoration: none;
 }
 
 #reply-title small a:before {