Primefaces BarChart (CartesianChartModel): DataItemValues not shown on mouseover - primefaces

I am on primefaces 3.0.M2-SNAPSHOT
Things work nicely with primefaces. Thanks very much for all your efforts!
I am trying to introduce some Charts to my App. Charts are loaded and displyed ok.
However, (using the data and code from ShowCase) when hovering over the charts, the values are not displayed (yet the color of the item does change). This is the case for pieCharts and barCharts I have tested so far. I have also tried inside/outside of layoutUnits, panels etc.. but with no success. Result is the same.
Anybody having the same problems? Reading throw the new documentation just released last week, I am not getting any wiser. Any hints on this?
Thanks.

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