title: jxbrowser demo crash on mac ox when view youtube video every time
body: <p>just as title indicated. I tried jxbtrowser demo (version 6.7.1), but it crashes every time when I look some video on youtube. It is ok when access to the main page of youtube website. It is NOT ok definitely when it is video page. </p>
  
  <p>I thought it is caused by adobe flash plugin, but after uninstall it, it is still not working. It's seems that youtube use html5 player rather then flash. </p>
  
  <blockquote>
    <p>jxbrowser-helper[17661] : CGAffineTransformInvert: singular
    matrix.</p>
  </blockquote>
  
  <p>And this is the error printed on console. </p>