title: css prefix for presto engine
body: <p>According to <a href="http://en.wikipedia.org/wiki/CSS_filter#Prefix_filters" rel="nofollow">Wikipedia</a> prefix for presto is <strong><code>-XV-</code></strong></p>
  
  <pre><code>-xv-color: #FF0;     /* paragraphs in yellow for Presto browsers */
  </code></pre>
  
  <p>I wanted to know for presto browser the prefix is <strong><code>-O-</code></strong> or <strong><code>-XV-</code></strong>. Is Wikipedia wrong?? </p>