title: Why won't my visited link have a background color?
body: <p>It seems that a:visited won't work in showing background color on my links. </p>
  
  <p><a href="http://jsfiddle.net/davestein/D2srA/" rel="noreferrer">http://jsfiddle.net/davestein/D2srA/</a></p>
  
  <p>What super simple thing am I missing?</p>