--- block.module	2006-09-12 21:31:07.000000000 -0700
+++ block.module	2006-09-12 21:30:26.000000000 -0700
@@ -402,7 +402,7 @@
 
   // Get the block subject for the page title.
   $info = module_invoke($module, 'block', 'list');
-  drupal_set_title(t("'%name' block", array('%name' => $info[$delta]['info'])));
+  drupal_set_title(t("'%name' block", array('%name' => strip_tags($info[$delta]['info']))));
 
   // Standard block configurations.
   $form['user_vis_settings'] = array(