Index: wp-includes/default-filters.php
===================================================================
--- wp-includes/default-filters.php	(revision 10996)
+++ wp-includes/default-filters.php	(working copy)
@@ -76,7 +76,7 @@
 
 // Format strings for display.
 $filters = array('comment_author', 'term_name', 'link_name', 'link_description',
-	'link_notes', 'bloginfo', 'wp_title');
+	'link_notes', 'bloginfo', 'wp_title', 'widget_title');
 foreach ( $filters as $filter ) {
 	add_filter($filter, 'wptexturize');
 	add_filter($filter, 'convert_chars');