Setting handles of a range slider programatically doesn't work

[wahlatlas]

it looks like when you try to set handles of a range slider programatically you can't use an array for the value, as would be expected when you set up the thing e.g.

rangeSlider.value([25, 75])

however you can move one slider handle by

rangeSlider.value(25)

but that defeats the purpose of a range slider, as the other handle can't be controlled at all.

This slider is such a valueable addition to the d3js toolkit that I hope it will find some skilled developers to contribute