title: Always getting "Invalid theme HTML" when submitting a theme on Tumblr
body: <p>Is anyone else having trouble submitting themes to Tumblr? I have had this problem for two weeks now.</p>
  
  <p>Whatever I try in the "Source code" field here <a href="https://www.tumblr.com/themes/new" rel="nofollow">https://www.tumblr.com/themes/new</a> comes back as "Invalid theme HTML".</p>
  
  <p>I have even tried the example markup here <a href="https://www.tumblr.com/docs/en/custom_themes" rel="nofollow">https://www.tumblr.com/docs/en/custom_themes</a> and that still returns as "Invalid theme HTML".</p>
  
  <p>Is there something wrong with the service at the moment? Do I need to use a particular combination of browser / OS?! I have tried with Chrome and IE11 on Windows.</p>
  
  <p>I have contacted Support and they have replied asking me to send them a screenshot.</p>