Index: wp-includes/feed-atom-comments.php
===================================================================
--- wp-includes/feed-atom-comments.php	(revision 21309)
+++ wp-includes/feed-atom-comments.php	(working copy)
@@ -16,11 +16,11 @@
 >
 	<title type="text"><?php
 		if ( is_singular() )
-			printf(ent2ncr(__('Comments on %s')), get_the_title_rss());
+			printf( ent2ncr( __( 'Comments on %s' ) ), get_the_title_rss() );
 		elseif ( is_search() )
-			printf(ent2ncr(__('Comments for %1$s searching on %2$s')), get_bloginfo_rss( 'name' ), get_search_query() );
+			printf( ent2ncr( __( 'Comments for %1$s searching on %2$s' ) ), get_bloginfo_rss( 'name' ), get_search_query() );
 		else
-			printf(ent2ncr(__('Comments for %s')), get_bloginfo_rss( 'name' ) . get_wp_title_rss());
+			printf( ent2ncr( __( 'Comments for %s' ) ), get_bloginfo_rss( 'name' ) . get_wp_title_rss() );
 	?></title>
 	<subtitle type="text"><?php bloginfo_rss('description'); ?></subtitle>
 
Index: wp-includes/feed-rss2-comments.php
===================================================================
--- wp-includes/feed-rss2-comments.php	(revision 21309)
+++ wp-includes/feed-rss2-comments.php	(working copy)
@@ -19,11 +19,11 @@
 <channel>
 	<title><?php
 		if ( is_singular() )
-			printf(ent2ncr(__('Comments on: %s')), get_the_title_rss());
+			printf( ent2ncr( __( 'Comments on: %s' ) ), get_the_title_rss() );
 		elseif ( is_search() )
-			printf(ent2ncr(__('Comments for %s searching on %s')), get_bloginfo_rss( 'name' ), esc_attr($wp_query->query_vars['s']));
+			printf( ent2ncr( __( 'Comments for %1$s searching on %2$s' ) ), get_bloginfo_rss( 'name' ), get_search_query() );
 		else
-			printf(ent2ncr(__('Comments for %s')), get_bloginfo_rss( 'name' ) . get_wp_title_rss());
+			printf( ent2ncr( __( 'Comments for %s' ) ), get_bloginfo_rss( 'name' ) . get_wp_title_rss() );
 	?></title>
 	<atom:link href="<?php self_link(); ?>" rel="self" type="application/rss+xml" />
 	<link><?php (is_single()) ? the_permalink_rss() : bloginfo_rss("url") ?></link>