title: Interesting UTF-8 Yahoo File Download Headers
body: <p>My company runs a webmail service, and we were trying to diagnose a problem with Word downloads not opening automatically - the same *.doc file download from Yahoo Mail would open, but one from ours would not.</p>
  
  <p>In the course of investigating the headers we saw this coming from Yahoo:</p>
  
  <pre><code>content-disposition attachment; filename*="utf-8''word document.doc";
  </code></pre>
  
  <p>Whereas our headers were like this:</p>
  
  <pre><code>content-disposition attachment; filename="word document.doc";
  </code></pre>
  
  <p>What exactly is Yahoo doing with the additional asterisk and utf-8'' designation?</p>