Formatstring in highlighter

Formatstring in highlighter

Hi,

Using highlighter I think the formatString doesn't work as expected. The format I like to have is e.g 23.1 as a float number. But I get 23.0 as a float number but rounded to zero.
I have the following little problem:
  1.         highlighter:{
              show: true,
              tooltipAxes: 'y',
              sizeAdjust: 12,
              yvalues: 3,
              //useAxesFormatters: false,
              formatString:'%0.1f #serieLabel#'
            },






How can I get the correct numer?

Thanks in advance
Guido