by david.gilbert » Fri Nov 02, 2012 8:09 am
In the StackedXYAreaRenderer2 class, there is a flag roundXCoordinates that you can set to true as a (not perfect) workaround for this issue.
A proper fix would probably involve calculating the areas that need to be filled across the complete dataset, and filling them in a single operation (the current renderer tries to fill the areas segment by segment).