title: RSS Feed created using Zend_Feed - firefox prompts to download not display as RSS
body: <p>I've created an RSS feed using Zend_Feed.</p>
  
  <p>It seems to have worked in that the resulting XML looks good. My problem is that Firefox won't recognise it as an RSS feed and instead prompts me to download the raw XML.</p>
  
  <p>Trying it in IE gives the error "this feed contains code errors" with the following extra info:</p>
  
  <p><code>
  Invalid xml declaration.
   Line: 2 Character: 3</p>
  
  <p>&lt; ? xml version="1.0" encoding="UTF-8" ?>
  </code></p>
  
  <p>Any help greatly appreciated.</p>