title: Highcharts milliseconds displaying incorrectly in xaxis
body: <p>I am having trouble having highcharts correctly format (or even format at all) the milliseconds I have listed as the categories of my xaxis.  My xAxis object looks as follows: </p>
  
  <pre><code>xAxis: {
          categories: [1373155200000, 1373241600000, 1373328000000, 1373414400000, 1373500800000, 1373587200000, 1373673600000, 1373760000000, 1373846400000, 1373932800000, 1374019200000, 1374105600000],
          type: 'datetime',
          dateTimeLabelFormats: {
  
              millisecond: '%H',
              second: '%H:%M:%S',
              minute: '%H:%M',
              hour: '%H:%M',
              day: '%e. %b',
              week: '%e. %b',
              month: '%b \'%y',
              year: '%Y'
  
          }
      }
  </code></pre>
  
  <p>But the xaxis of my graph is still displaying the labels as milliseconds.  The tooltip parses the label correctly.</p>
  
  <p>Here's a jsfiddle I have displaying the problem: <a href="http://jsfiddle.net/WSsZz/2/" rel="nofollow">http://jsfiddle.net/WSsZz/2/</a></p>
  
  <p>Any pointers will help!</p>