Hi there,
I'm currently trying to use stacked column charts to draw an activity map.
I have a small issue with the yAxis : when there aren't any categories, alignment between the data and ticks is correct. (http://jsfiddle.net/t2MxW/13168/).
As soon as I add categories to the yAxis the alignment is messing up. (http://jsfiddle.net/t2MxW/13170/)
I tried to play with all the properties of yAxis but I didn't find anything consistent.
Any idea ?