Highstock: setting the navigator's xAxis min and max - highcharts

Question

I am using Highstock charts, and there is a requirement to show line graphs with a fixed x-axis range, irrespective of the data. Setting the xAxis min and max properties accomplishes that for me.
The trouble comes when I try to use the navigator. The API documentation says that the you can include an xAxis object in the navigator options which can contain all of the same properties, but here, setting the min and max properties doesn't seem to do anything: the xAxis on the navigator still begins and ends at the data min and data max. Instead, I'm trying to get it to use the same xAxis settings as the main chart.
I've thought about inserting fake data points into the series at the desired min and max (with a value of null), but was hoping there was a better way to accomplish this.
A simple example can be found here: http://jsfiddle.net/j6GFq/2
$('#container').highcharts('StockChart', {
chart: {},
navigator: {
xAxis: {
min: 0,
max: 100,
ordinal: false
}
},
xAxis: {
ordinal: false,
min: 0,
max: 100
},
rangeSelector: {
enabled: false
},
series: [{
data: [
[10, 20],
[20, 40],
[50, 10]
]
}]
});