title: css rem unit not working with font declarations
body: <p>This css property is not working on IE10:</p>
  
  <pre><code>font: bold 3rem/6rem Arial;
  </code></pre>
  
  <p>However, if I split this property to separate properties it works:</p>
  
  <pre><code>font-size: 3rem;
  font-weight: bold;
  line-height: 6rem;
  font-family: Arial;
  </code></pre>
  
  <p>I can also use PX instead and it also works:</p>
  
  <pre><code>font: bold 48px/96px Arial;
  </code></pre>
  
  <p>You can try it on every page with IE debugger. Why is this property not working on IE but on all other browsers?</p>