diff -r f507feede89a -r 09a1c134465b web/wp-includes/class-IXR.php
--- a/web/wp-includes/class-IXR.php	Wed Dec 19 12:35:13 2012 -0800
+++ b/web/wp-includes/class-IXR.php	Wed Dec 19 17:46:52 2012 -0800
@@ -466,11 +466,18 @@
 
     function output($xml)
     {
-        $xml = '<?xml version="1.0"?>'."\n".$xml;
+        $charset = function_exists('get_option') ? get_option('blog_charset') : '';
+        if ($charset)
+            $xml = '<?xml version="1.0" encoding="'.$charset.'"?>'."\n".$xml;
+        else
+            $xml = '<?xml version="1.0"?>'."\n".$xml;
         $length = strlen($xml);
         header('Connection: close');
         header('Content-Length: '.$length);
-        header('Content-Type: text/xml');
+        if ($charset)
+            header('Content-Type: text/xml; charset='.$charset);
+        else
+            header('Content-Type: text/xml');
         header('Date: '.date('r'));
         echo $xml;
         exit;