Index: src/wp-admin/css/customize-controls.css
===================================================================
--- src/wp-admin/css/customize-controls.css	(revision 33868)
+++ src/wp-admin/css/customize-controls.css	(working copy)
@@ -1208,6 +1208,16 @@
 	box-shadow: 0 1px 3px rgba(0,0,0,0.13);
 }
 
+body.cheatin h1 {
+	border-bottom: 1px solid #dadada;
+	clear: both;
+	color: #666;
+	font: 24px "Open Sans", sans-serif;
+	margin: 30px 0 0 0;
+	padding: 0;
+	padding-bottom: 7px;
+}
+
 body.cheatin p {
 	font-size: 14px;
 	line-height: 1.5;
Index: src/wp-admin/js/customize-controls.js
===================================================================
--- src/wp-admin/js/customize-controls.js	(revision 33868)
+++ src/wp-admin/js/customize-controls.js	(working copy)
@@ -3028,7 +3028,10 @@
 		},
 
 		cheatin: function() {
-			$( document.body ).empty().addClass('cheatin').append( '<p>' + api.l10n.cheatin + '</p>' );
+			$( document.body ).empty().addClass( 'cheatin' ).append(
+				'<h1>' + api.l10n.cheatin + '</h1>' +
+				'<p>' + api.l10n.notAllowed + '</p>'
+			);
 		},
 
 		refreshNonces: function() {
Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 33868)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -428,6 +428,7 @@
 		'cancel'             => __( 'Cancel' ),
 		'close'              => __( 'Close' ),
 		'cheatin'            => __( 'Cheatin&#8217; uh?' ),
+		'notAllowed'         => __( 'You are not allowed to customize the appearance of this site.' ),
 		'previewIframeTitle' => __( 'Site Preview' ),
 		'loginIframeTitle'   => __( 'Session expired' ),
 		'collapseSidebar'    => __( 'Collapse Sidebar' ),