title: Highcharts 3.0, area chart with stacked and unstacked series - how to fix?
body: <p>I have a complex area chart, which uses some stacked and some unstacked series.</p>
  
  <p>Prior to version 3, everything worked fine.
  With version 3, there are some odd buggy behaviors, in both firefox and chrome:
  Example here: <a href="http://jsfiddle.net/jlbriggs/yj3FP/" rel="nofollow">http://jsfiddle.net/jlbriggs/yj3FP/</a></p>
  
  <pre><code>stacking:'normal',
  </code></pre>
  
  <p>If I disable stacking, everything looks as expected. But I need stacking.
  So, if you comment out the 'stacking:normal' line, you will see the chart as it should be, except for the stacking part...</p>
  
  <p>In the example linked to above, if you hide all of the area series except for the 'predicted' series, you will see things looking how they should.  Notice that the big thick line bordering the 'predicted' series is gone - it shouldn't be there in the first place! that line is all of the other stacked series, which do not extend along the x axis into the area of the 'predicted' series, wrapping up and over the 'predicted' series.</p>
  
  <p>Now, having hidden those stacked area series, show them again - notice the very bizarre way the line twists and zig zags....</p>
  
  <p>I realize this is a complex explanation. It is difficult problem to explain :)  </p>
  
  <p>So the question is:</p>
  
  <p>1) What is going on here??</p>
  
  <p>2) How do I make it stop??  :)</p>
  
  <p>The issues on github are listed as solved, but I am still having the exact same issue with this chart.</p>