json - Highcharts: Updating a Pie Chart with setData()

I am trying to work out how to update a Highcharts pie chart but for the life of me cannot seem to get it working right.

I have looked over the documentation and have been able to get a bar and line and spline graph to update fine but when using this function for pie charts it just does not work.

I am currently feeding in:

item.setData([["none", 100]], true);

Where item equals the series like so:

$.each(browser_chart.series, function(i, item){
    if(item.name == 'Browser share'){
        console.log(data.browsers);
        item.setData([["none", 100]], true);

    }
});

Which as shown in the demos is how the data for a pie chart is formatted. Problem is it cannot seem to read the series correctly. I try:

item.setData([\"none\", 100], true);

And it seems to do something but cannot read the x and y values right (which of course means it's wrong).

Can anyone here point me in the direction to get this working?

Thanks,

Answer

Edited:
When you set a new data you have to set as array of arrays for all pie parts in this case.
In my Example I have six categories, so I've to set data for all of them.

So, in this case you have to do something like:

var seriesData = [];

$.each(browser_chart.series, function(i, item) {
    if(item.name == 'Browser share'){
        seriesData.push(["serie"+i, someNumber]);
    }
});
chart.series[0].setData(seriesData, true);