Index: wp-includes/deprecated.php
===================================================================
--- wp-includes/deprecated.php	(revision 21049)
+++ wp-includes/deprecated.php	(working copy)
@@ -3111,9 +3111,14 @@
 		'Status' => $theme->get('Status'),
 		'Tags' => $theme->get('Tags'),
 		'Title' => $theme->get('Name'),
-		'AuthorName' => $theme->display('Author', false, false),
+		'AuthorName' => $theme->get('Author'),
 	);
 
+	foreach ( apply_filters( 'extra_theme_headers', array() ) as $extra_header ) {
+		if( isset( $theme_data[ $extra_header ] ) ) continue;
+		$theme_data[ $extra_header ] = $theme->get( $extra_header );
+ 	}
+
 	return $theme_data;
 }