title: React 16 warning "warning.js:36 Warning: Did not expect server HTML to contain a <div> in <div>."
body: <p>I'm using the React 16 beta (react-fiber) with server side rendering</p>
  
  <p>What I am to understand this to mean?</p>
  
  <pre><code>warning.js:36 Warning: Did not expect server HTML to contain a &lt;div&gt; in &lt;div&gt;.
  </code></pre>