Wt

Stacking does not work in the charts example (http://www.webtoolkit.eu/wt/examples/charts/charts.wt) as might be expected. For example, set all line types to curve, and then set "Urban Male" type to "stacked curve area"; this should look the same as setting it to "curve area". It seems there is a hidden assumption about what is to be stacked.

This is also true of "Stacked Bar". If all types are set to "bar", and then set to "stacked bar" in order, the expected result is obtained. If set out of order, (eg first set "urban male" to "stacked bar") we get anomalous stacking.