JFreechart XYPlot Overlapping Data Artifacts
I am trying to draw some bar graphs with a data set that contains overlapping priorities.

E.g. three bars of different colors may be drawn at one point, but the one with the highest priority will be shown.  This works most of the time, but I am getting some artifacts on my plot as some of the colors from lower priorities leak through occasionally.  Any ideas of where I can look to fix this problem?

I thought it may have been an anti-aliasing issue, but turning it on or disabling it has no effect on the artifacts.
JFreechart XYPlot Overlapping Data Artifacts
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I am trying to draw some bar graphs with a data set that contains overlapping priorities.

E.g. three bars of different colors may be drawn at one point, but the one with the highest priority will be shown.  This works most of the time, but I am getting some artifacts on my plot as some of the colors from lower priorities leak through occasionally.  Any ideas of where I can look to fix this problem?

I thought it may have been an anti-aliasing issue, but turning it on or disabling it has no effect on the artifacts.