System.Windows.Data Warning: 4 : 
Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='Telerik.Windows.Controls.Charting.ChartLegend', AncestorLevel='1''. BindingExpression:Path=LegendItemMarkerShape; DataItem=null; targ

Labels for 0-value data points do not get alternative positions.

Reproducible only with Visual Studio 2015.

To work this around enable the Managed Compatibility Mode of the VS 2015 debugger. See the attached image (set-use-managed-compatibility-mode.png).

this.RadChart1.DefaultView.ChartArea.DataSeries[0].Definition.PointMarkItemStyle = pointmarkStyle;
does not have effect when set on button click.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView (use the DefaultVisualStyle or PointTemplate properties of the series).

Chart: Chart is not updated when the IsLogarithmic property of the AxisY changes at run-time. The issue is simply reproduced when the IsLogarithmic changes at run-time and the chart is resized.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

When the chart is created in code behind and not attached to the visual tree - ExportToImage produces incorrect output, such as missing series and axis lines.

REASON FOR DECLINATION
This is supported by the new RadChartView by manually measuring and arranging it prior to export.

When the item's value is zero - the label is not placed correctly (LabelDisplayMode="Outside"). It is being placed as "Inside".
A work-around: to set LabelDisplayMode="Inside" Distance="-20".

When two or more range series are used -  the range bars are overlapping each other, they are being placed one on top of another instead of being placed next to each other (as is the behaviour with regular bar series).

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

Bindings don't work for axes in the AdditionalAxes collection of the chart area. Wpf only.

REASON FOR DECLINATION
This is supported out-of-the-box by the new RadChartView.

RadChart throws an exception when placed inside the page content of a WPF FixedDocument ("FixedDocument is not a Visual or Visual3D").

The exception is thrown on "OrderViewModel" of the FirstLook demo.

Changing IsLogaritmic and AutoRange runtime produces wrong labels. See attached project to reproduce.

LegendItems don't get colors from PaletteBrushes if defined on ChartArea

RadChart throws LayoutCycle exception when setting RangeStart and RangeEnd in ScrollOnly mode. Depends on the size of the chart. See attached project.

When RadChart is in ControlTemplate, the legend cannot be collapsed

When you make the window very small in height and then revert it back to normal size the Pie connectors are gone.

From Ticket ID 464372. 
An exception is thrown ( in the output ) when saving the image.

Two RadPanes and two Charts in each. The Legend in the first is show as expected, but in the second - there are no Legend Items.

When zooming in/out, the MajorGridLines of the AxisX disappear. This issue is not always reproducible.

REASON FOR DECLINATION
This is supported by the new RadChartView.

Chart: SeriesMappings are not associated with the corresponding ChartArea on update. THis happens only in non-default layout scenarios.