title: wkhtmltopdf command fails
body: <p>I am trying to convert a HTML file to PDF using <code>wkhtmltopdf</code>.</p>
  
  <p>For that purpose I have installed wkhtmltopdf on a Debian box and am trying to run this command:</p>
  
  <pre><code>/usr/bin/xvfb-run -a -s "-screen 0 640x480x16" wkhtmltopdf /path/convert.1303714349.4961.html.tmp /path/convert.1303714349.4961.pdf.tmp
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>Loading page (1/2)
  Error: Failed loading page file:///path/convert.1303714349.4961.html.tmp (sometimes it will work just to ignore this error with --ignore-load-errors)
  </code></pre>
  
  <p>The file does exist in <code>/path/convert.1303714349.4961.html.tmp</code>, and the permissions are set correctly. Can it have anything to do with the path being prepended with <code>file://</code>?</p>