From 4685f9ea044c0b595831366bf2b2f37c53ed82be Mon Sep 17 00:00:00 2001
From: ryan <ryan@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Tue, 22 May 2012 20:34:45 +0000
Subject: [PATCH] Don't concatenate. see #19910

git-svn-id: http://core.svn.wordpress.org/trunk@20845 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/admin-header.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-admin/admin-header.php b/wp-admin/admin-header.php
index fa350623c..8cb315284 100644
--- a/wp-admin/admin-header.php
+++ b/wp-admin/admin-header.php
@@ -102,7 +102,7 @@ $admin_body_class .= ' no-customize-support';
 // This prevents a flash of unstyled content.
 if ( wp_script_is( 'customize-loader', 'queue' ) ) : ?>
 	if ( window.postMessage )
-		document.body.className += document.body.className.replace('no-customize-support','customize-support');
+		document.body.className = document.body.className.replace('no-customize-support','customize-support');
 <?php endif; ?>
 </script>