Charts - larger hover markers not drawn properly

[denchen]

If you set the style of a marker in a combo chart to have a larger width/height when hovering (the 'over' property), in some cases, the larger marker does not draw properly.

If you look at:
http://jsfiddle.net/accelerate/cf9Mt/

And hover over the two lowest-value datapoints, the markers are not fully drawn. Interestingly, if you move the slider back and forth, which forces the chart to redraw, the markers becomes whole.

Also, this appears only on Chrome and Firefox. On IE 10, the markers render fine. Not sure about Safari.

This is definitely just a minor nuisance and should be very low on the priority totem pole, but just thought I should point it out.