Can't get titleAngle to work on y-axis in line chart

[Tony Green]

Hi,
Here is my fiddle: http://jsfiddle.net/runamuk0/v4w52tq3/1/

As I understand the yaxis title is supposed to be at 90 degrees by default but it doesn't work nor does setting it as below.  Is this a bug or am I just doing this wrong?

(function basic(container) {

  var
    d1 = [[0, 3], [4, 8], [8, 5], [9, 13]], // First data series
    graph;

  // Draw Graph
  graph = Flotr.draw(container, [ d1 ], {
    xaxis: {
      minorTickFreq: 2,
        title: "The x-axis"
    },
    yaxis: {
      minorTickFreq: 2,
        title: "The y-axis",
        titleAngle: 90
    },
    grid: {
      minorVerticalLines: true
    }
  });
})(document.getElementById("example"));

Tony

[Tony Green]

Oh never mind... I found the problem.

HtmlText : false

This option evidently fixes the problem.  Not exactly sure why though.