Horizontal bar chart w/ JSChart

Is it possible to have JSChart render its bars horizontally? I've looked over the properties here:

http://docs.splunk.com/Documentation/Splunk/4.3/Developer/CustomChartingConfig-chartlegend

and it looks like "bar" is what I want ("The bar chart is a cartesian chart that renders data as horizontal bars"). However, when I try to use the charting.chart properties I get an error: "Misconfigured view 'overview' - Unknown parameter 'charting.chart' is defined for module JSChart. Make sure the parameter is specified in JSChart.conf."

Based on the example in the above document, I was using:

<param name="charting.chart">bar</param>

Is that indeed the correct parameter?