When a dataviz chart is bound to a series that contains null points (for example if no data exists for a particular item on given column in data model), hovering over that series in the legend causes an error in the DataViz pointsBySeriesIndex function. A workaround is to edit the source JS function, adding a check to see if points[j] is undefined. Is it possible to fix this in future releases?
Hi Andrew, Please file this as a bug in the Kendo UI ticketing system from you account.