title: xkcd style graph - error with registered fonts
body: <p>I want to create the graph, like at the <a href="https://stackoverflow.com/questions/12675147/how-can-we-make-xkcd-style-graphs-in-r/13985143#comment19302007_13985143">link</a> for the previous topic, but receive error:</p>
  
  <blockquote>
    <p>In grid.Call(L_textBounds, as.graphicsAnnot(x$label), x$x, x$y, : Font
    family not found in Windows font database</p>
  </blockquote>
  
  <p>Though <code>fonts()</code> shows "Humor Sans" and "xksd" are installed. I use Windows 7 64bit, R 2.15.2 RStudio 0.96.331. </p>
  
  <p>Any suggestions how to fix it?</p>