Short of the fact that short tags might conflict with PHP, can someone explain to me any reason why you should not feed XML output (or even XHTML) to a PHP processor for further processing?
See here if you'd like more details:
Amazon Web Services Discussion (webservices.amazon.com)
No .... nothing really comes to mind ... (your link doesn't work for me; not even when I knock off the extra http// - it just gets lost in eternal redirection).
