title: Correct MIME Type for favicon.ico?
body: <p>According to the <strong>Internet Assigned Numbers Authority</strong> (IANA), all .ico file falls under the MIME type <code>image/vnd.microsoft.icon</code>. (<a href="http://www.iana.org/assignments/media-types/image/vnd.microsoft.icon" rel="noreferrer">Source</a>)</p>
  
  <p>E.g.
  <code>&lt;link rel="icon" type="image/vnd.microsoft.icon" href="favicon.ico" /&gt;</code></p>
  
  <p>However, savvy internet guru, <strong>Paul Irish</strong>, claims this is wrong, and that it would actually be <code>image/x-icon</code>. (<a href="https://github.com/paulirish/html5-boilerplate/commit/37b5fec090d00f38de64b591bcddcb205aadf8ee" rel="noreferrer">Source</a>)</p>
  
  <p>E.g.
  <code>&lt;link rel="icon" type="image/x-icon" href="favicon.ico" /&gt;</code></p>
  
  <p>I know you can get away with not including a "type" for .ico files, but if you were going to include one, which should it be? Are there actually any problems with serving it as official IANA type?</p>