<!--
Description: entry source subtitle base64-encoded
Expect:      not bozo and entries[0]['source']['subtitle'] == u'Example <b>Atom</b>'
-->
<feed xmlns="http://www.w3.org/2005/Atom">
<entry>
<source>
  <subtitle type="application/octet-stream">
    RXhhbXBsZSA8Yj5BdG9tPC9iPg==
  </subtitle>
</source>
</entry>
</feed>