[Plugin: WordPress Menu Exporter] Error during export

end xml-file:

</channel>
</rss>
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/vhost/site.com/wp-content/plugins/menu-exporter/menu-exporter.php:166) in <b>/home/vhost/site.com/wp-admin/includes/export.php</b> on line <b>39</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/vhost/site.com/wp-content/plugins/menu-exporter/menu-exporter.php:166) in <b>/home/vhost/site.com/wp-admin/includes/export.php</b> on line <b>40</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/vhost/site.com/wp-content/plugins/menu-exporter/menu-exporter.php:166) in <b>/home/vhost/site.com/wp-admin/includes/export.php</b> on line <b>41</b><br />
<br />
<b>Fatal error</b>:  Cannot redeclare wxr_cdata() (previously declared in /home/vhost/site.com/wp-content/plugins/menu-exporter/menu-exporter.php:69) in <b>/home/vhost/site.com/wp-admin/includes/export.php</b> on line <b>122</b><br />

WordPress v3.5

To make the plugin work with WP v3.5 I added the following line of code ad the very end of the plugin (new code in bold):

…
</channel>
</rss>
<?php
die;
}

Hope that helps!