Index: wp-content/themes/twentyten/search.php
===================================================================
--- wp-content/themes/twentyten/search.php	(revision 13896)
+++ wp-content/themes/twentyten/search.php	(working copy)
@@ -14,7 +14,7 @@
 			<div id="content">
 
 <?php if ( have_posts() ) : ?>
-				<h1 class="page-title"><?php printf( __( 'Search Results for: %s', 'twentyten' ), '<span>' . get_search_query() . '</span>' ); ?></h1>
+				<h1 class="page-title"><?php printf( __( 'Search Results for: %s', 'twentyten' ), '<span>' . esc_attr( apply_filters( 'the_search_query', get_search_query() ) ) . '</span>' ); ?></h1>
 				<?php
 				/* Run the loop for the search to output the results.
 				 * If you want to overload this in a child theme then include a file