Index: wp-admin/includes/plugin-install.php
===================================================================
--- wp-admin/includes/plugin-install.php	(revision 29267)
+++ wp-admin/includes/plugin-install.php	(working copy)
@@ -337,7 +337,8 @@
 		'a' => array( 'href' => array(), 'title' => array(), 'target' => array() ),
 		'abbr' => array( 'title' => array() ), 'acronym' => array( 'title' => array() ),
 		'code' => array(), 'pre' => array(), 'em' => array(), 'strong' => array(),
-		'div' => array(), 'p' => array(), 'ul' => array(), 'ol' => array(), 'li' => array(),
+		'div' => array( 'class' => array() ), 'span' => array( 'class' => array() ),
+		'p' => array(), 'ul' => array(), 'ol' => array(), 'li' => array(),
 		'h1' => array(), 'h2' => array(), 'h3' => array(), 'h4' => array(), 'h5' => array(), 'h6' => array(),
 		'img' => array( 'src' => array(), 'class' => array(), 'alt' => array() )
 	);