title: Highcharts: y-axis labels are missing
body: <p>I've written dozens of these charts and have never had this problem. My y-axis labels aren't showing up in this particular chart:</p>
  
  <pre><code>$(function () {
  $('#container').highcharts({
      chart: {
          alignTicks: false,
          animation: {
              animation: false
          },
          height: 180,
          reflow: true,
          width: 425,
          zoomType: 'x'
      },
      credits: {
          enabled: false
      },
      legend: {
          enabled: false,
          layout: 'horizontal'
      },
      plotOptions: {
          line: {
              animation: false,
              marker: {
                  radius: 0
              },
              stickyTracking: false,
              turboThreshold: 5000000,
              zIndex: 1
          },
          spline: {
              animation: false,
              marker: {
                  radius: 0
              },
              turboThreshold: 5000
          }
      },
      title: {
          text: ''
      },
      tooltip: {
          backgroundColor: '#303030',
          borderColor: 'white',
          borderRadius: 0,
          borderWidth: 1,
          style: {
              font: '20pt [FontFamily: Name=Microsoft Sans Serif]',
              padding: '10px',
              color: 'white'
          },
          valueDecimals: 0,
          valueSuffix: 'F'
      },
      xAxis: {
          categories: ['Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Mon', 'Tue'],
          lineColor: 'black',
          lineWidth: 2
      },
      yAxis: {
          endOnTick: false,
          gridLineWidth: 0,
          lineWidth: 2,
          maxPadding: 0,
          minPadding: 0,
          startOnTick: false,
          id: 'ForecastData',
          lineColor: 'black',
          linkedTo: 0,
          offset: 0,
          title: {
              text: ''
          },
          type: "linear"
      },
      exporting: {
          buttons: {
              exportButton: {
                  enabled: false
              },
              printButton: {
                  enabled: false
              }
          },
          enabled: false
      },
      series: [{
          data: [33, 31, 35, 33, 36, 37, 36],
          labelText: 'Daily Min Temperature',
          name: 'Daily Min Temperature',
          type: 'spline',
          color: '#2177E0'
      }]
  
  });
  </code></pre>
  
  <p>});</p>
  
  <p><a href="http://jsfiddle.net/5QBzv/" rel="nofollow">http://jsfiddle.net/5QBzv/</a></p>
  
  <p>I can't seem to figure out what I'm missing. Any ideas?</p>
  
  <p>Thanks!</p>