I implemented a slightly changed version of the gantt chart proposed in http://nbviewer.jupyter.org/gist/quebbs/10416d9fb954020688f2
Across browser (and also with the original implementation) though I have odd problems with Mouse Wheel Zoom.
Once activated, all rectangles will disappear and the graph will become utterly useless. At times, even the reset button does not work and the only hope is a page reload. Interestingly, hovering with the mouse over the then white plain still brings up hover boxes every now and then.
Box zoom works just fine on the other hand.
Any ideas why this could be?