title: Opera + border-radius + svg background = bug?
body: <p>i've got bug in Opera 11.64 browser. Check it out here <a href="http://jsfiddle.net/wqCDm/13/" rel="nofollow">http://jsfiddle.net/wqCDm/13/</a></p>
  
  <p>Button has <code>background: url(data:image/svg+xml;base64...</code> and is located in block with <code>position: fixed</code>. When you start scroll page background rolls away, and after you get back to the top it shows up again.</p>
  
  <p>Without <code>border-radius</code> it works properly.</p>