title: PDFkit doesn't display pictures in PDF
body: <p>Rails 2, PDFkit 0.5.0</p>
  
  <p>Im generating a PDF from a View in Rails 2 with PDFkit and everything works fine. The only thing which doesn't work is displaying pictures in the pdf.</p>
  
  <p>When I look at the View in the Browser, the picture is there but its missing in the PDF. There is only a placeholder existing in the PDF.</p>
  
  <p>The image_tag is looking like this:</p>
  
  <pre><code>&lt;%= image_tag('plus.gif') %&gt;
  </code></pre>
  
  <p>I also tried to realize it with a css-file but it doesn't work either.</p>
  
  <p>Any ideas?</p>