Index: wp-content/themes/twentythirteen/style.css
===================================================================
--- wp-content/themes/twentythirteen/style.css	(revision 23468)
+++ wp-content/themes/twentythirteen/style.css	(working copy)
@@ -810,8 +810,13 @@
 
 .site-header a {
 	color: #141412;
+	text-decoration: none;
 }
 
+.site-header .site-title:hover {
+	text-decoration: underline;
+}
+
 .site-title {
 	font-size: 60px;
 	font-weight: bold;
@@ -987,7 +992,7 @@
 	z-index: 3;
 }
 
-.navbar-fixed #masthead .site-title a {
+.navbar-fixed #masthead .site-title {
 	color: #141412 !important; /* Must override custom header text color. */
 }
 
Index: wp-content/themes/twentythirteen/js/theme-customizer.js
===================================================================
--- wp-content/themes/twentythirteen/js/theme-customizer.js	(revision 23468)
+++ wp-content/themes/twentythirteen/js/theme-customizer.js	(working copy)
@@ -9,7 +9,7 @@
 	// Site title and description.
 	wp.customize( 'blogname', function( value ) {
 		value.bind( function( to ) {
-			$( '.site-title a' ).text( to );
+			$( '.site-title' ).text( to );
 		} );
 	} );
 	wp.customize( 'blogdescription', function( value ) {
Index: wp-content/themes/twentythirteen/header.php
===================================================================
--- wp-content/themes/twentythirteen/header.php	(revision 23468)
+++ wp-content/themes/twentythirteen/header.php	(working copy)
@@ -39,10 +39,12 @@
 <body <?php body_class(); ?>>
 	<div id="page" class="hfeed site">
 		<header id="masthead" class="site-header" role="banner">
-			<hgroup>
-				<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
-				<h2 class="site-description"><?php bloginfo( 'description' ); ?></h2>
-			</hgroup>
+			<a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home">
+				<hgroup>
+					<h1 class="site-title"><?php bloginfo( 'name' ); ?></h1>
+					<h2 class="site-description"><?php bloginfo( 'description' ); ?></h2>
+				</hgroup>
+			</a>
 
 			<div id="navbar" class="navbar">
 				<nav id="site-navigation" class="navigation main-navigation" role="navigation">
Index: wp-content/themes/twentythirteen/inc/custom-header.php
===================================================================
--- wp-content/themes/twentythirteen/inc/custom-header.php	(revision 23468)
+++ wp-content/themes/twentythirteen/inc/custom-header.php	(working copy)
@@ -112,7 +112,7 @@
 		// If the user has set a custom color for the text, use that.
 		elseif ( $text_color != get_theme_support( 'custom-header', 'default-text-color' ) ) :
 	?>
-		.site-title a,
+		.site-title,
 		.site-description {
 			color: #<?php echo esc_attr( $text_color ); ?> !important;
 		}
