6.4.3 Opacity slider does not work and maybe improvemen of opacity toolbar design

1.) Desktop Test Win 8/ IE 10
2.) Moving the opacity slider in the toolbar
3.) there is no change in opacity in the map; plus design looks a little akward -> only shows 0 and 1
4.) we would have expected change in opacity in the map, but does not occur by moving the slider; plus design could maybe be improved