--- inc/template.process.inc.orig	2011-04-20 12:17:53.964110849 +0100
+++ inc/template.process.inc	2011-04-20 12:24:05.215766764 +0100
@@ -120,11 +120,12 @@
     $vars['visibility'] = '';
     $vars['hide_site_name'] = FALSE;
   }
-  $sitename = filter_xss_admin(variable_get('site_name', 'Drupal'));
+  $sitename = filter_xss(variable_get('site_name', 'Drupal'), array('b', 'big','br', 'em', 'i', 'small', 'span', 'strong', 'sub', 'sup'));
   $vars['site_name'] = $sitename ? l($sitename, '<front>', array(
     'attributes' => array(
       'rel' => 'home',
       'title' => t('Home page')),
+    'html' => TRUE,
     )
   ) : '';
   if (isset($vars['main_menu'])) {