Mimetype not set for AJAX response

fivestar_vote() generates the response to an AJAX request when a vote is made, but doesn't set the mime type for the content of the response. Because of this, I ran into an issue with jquery in that although the response was received from the server, it wasn't interpreted as XML, so the values weren't parsed by jquery's selectors. See http://jquery.com/pipermail/discuss_jquery.com/2006-October/013216.html

The following changes force the mimetype and ensure the output is valid XML by adding a root element.

--- all/modules/fivestar/fivestar.module        (revision 3708)
+++ all/modules/fivestar/fivestar.module        (working copy)
@@ -60,7 +60,7 @@
   if (count($result)) {
     $output = '';
     $output .= '<?xml version="1.0" encoding="UTF-8"?>';
-    $output .= '<result>';
+    $output .= '<xml><result>';
     foreach ($result as $data) {
       $output .= '<'. $data->function .'>' . $data->value . '</'. $data->function .'>';
     }
@@ -70,12 +70,12 @@
     $output .= '<value>' . $value . '</value>';
     $output .= '<type>' . $type . '</type>';
     $output .= '<id>' . $cid . '</id>';
-    $output .= '</vote>';
+    $output .= '</vote></xml>';
   }
   else {
     $output = 'false';
   }
-
+  header("Content-type: application/xhtml+xml");
   exit($output);
 }

I discovered this when trying to use the data passed by the fivestarResult() javascript hook.