title: Strange lines in Canvas with Transformation Matrix
body: <p>I'm new in drawing with HTML5 canvas, now, I've done the following demo:</p>
  
  <p><a href="https://dl.dropbox.com/u/4423757/demo2Canvas.html" rel="nofollow">https://dl.dropbox.com/u/4423757/demo2Canvas.html</a></p>
  
  <p>so here are my questions:<br/></p>
  
  <ul>
  <li><p>How can I make disappear the red lines in the silver shadow?</p></li>
  <li><p>Should use SVG in this case?</p></li>
  </ul>
  
  <p><b>Thanks!</b></p>