title: span and anchor default height
body: <p>Could you tell me why <code>&lt;a&gt;</code> has a different height of the span element?</p>
  
  <p>Why <code>&lt;a&gt;</code> is vertical centered aligned and span is taking all the vertical available space?</p>
  
  <p><a href="http://jsfiddle.net/vpVEf/12/" rel="nofollow">http://jsfiddle.net/vpVEf/12/</a></p>