title: Graphite: graphs not rendering, image cannot be displayed because it contains errors
body: <p>I am new to graphite. After setting it up, I ran into the issue that no graphs can be viewed (or plotted) but everything else seems fine. If I tried to open the graph directly from its url it says "The image http://.... cannot be displayed because it contains errors".</p>
  
  <p>Below is the output in console when I tried clicked on <code>loadavg_1min</code> and displayed it:</p>
  
  <pre><code>[03/Aug/2015 21:07:06]"GET /render/?width=1041&amp;height=542&amp;_salt=1438661217.502 HTTP/1.1" 200 4
  - Broken pipe from ('127.0.0.1', 52538)
  </code></pre>
  
  <p>There are nothing special about my setup, I use a Mac 10.10 and totally follow the documentation to follow the initialization, everything is default except the <code>CARBONLINK_HASHING_KEYFUNC</code> in local_settings.py, which I set it to "None". And I followed this link to get started: <a href="http://graphite.wikidot.com/quickstart-guide" rel="nofollow">http://graphite.wikidot.com/quickstart-guide</a>.</p>
  
  <p>I will provide more information if that is needed. Thank you in advance!</p>
  
  <p>In my Graphite Browser, the Graphite Composer just shows a broken image.  </p>