title: Highcharts empty when zoomed X
body: <p>In a simple column graph with datetime values {UTC, y-value}, any attempt of zooming results in an empty graph, even parts where there have to be data.</p>
  
  <p>Labels under the graph are correct so the UTC values should be ok.</p>
  
  <p>What am I doing wrong?<br>
  Thank you</p>
  
  <p>JSFiddle: <a href="http://jsfiddle.net/hhoo29sy/1/" rel="nofollow">http://jsfiddle.net/hhoo29sy/1/</a></p>
  
  <pre><code>...
  chart: {
      type: 'column',
      zoomType: 'x'
  },
  xAxis: {
      type: 'datetime',
      minRange: 14 * 86400000, // 2 weeks
      dateTimeLabelFormats: {
          month: '%e. %b',
          year: '%b'
      },
      minTickInterval: 12 * 3600 * 1000
  },
  ...
  </code></pre>