[Solved]-Strange tooltip behavior with long series in highcharts-Highcharts

The problem is in dataGrouping, when disabled works fine: http://jsfiddle.net/34tfg/1/

DataGrouping is method in Highcharts to approximate points and display them when width of the chart is not enough, e.g. how to display 10 000points in a chart of width 1 000px -> 10 points in a one pixel..? And when dataGrouping is used, new points are created, so all your custom options like 'names' etc. are lost (at least not accessible).

Code:

    plotOptions: {
        line: {
            dataGrouping: {
                enabled: false
            },
            turboThreshold: 10000
        }
    },