Resolved with lib version 2014.2.0825.

Please provide a property that will allow a message to be displayed to users when RadGridView is empty. 
Some users perception is that the program is not working properly when there is no data in the grid view so displaying a user-friendly message can be a useful way of preventing inquires and complaints.

This problem is reproducible only in WPF and can be observed on both Row Context Menu and Header Context Menu QSF examples.

The fix will be available with Q2 2015 version.

GridViewCell.Errors - System.Collections.IEnumerable Errors { set; get; }

Errors collection always returns a collection of strings.  When using .NET 4.5 and INotifyDataErrorInfo the errors can be any type. In our case we are using a custom ValidationResult object that has different severity levels.

Because GridViewCell.Errors always returns strings and not the original underlying ValidationResult object our DataTemplate for ValidationResult is not applied.

Resolved with lib version 2014.2.714.

GroupFooterRowStyleSelector is not persisted, when you expand and collapse a group

All DragVisualProviders for the RadListBox, as described in http://www.telerik.com/help/silverlight/radlistbox-features-dragdrop.html, show as a bare minimum a horizontal line that clearly shows where the drop within the list will occur.

Unfortunately the RadGridView does not even have that out of the box for its DragVisualProviders, so dragging elements within a RadGridView provides no indication at all to where the drop will happen! This seems like a very basic feature the RadGridView should have to support dragging/dropping within it (which also seems like a very common functionality).

The NullReferenceException is observed when the GridView is Grouped and rebound in the CellEditedEnded event handler.

The problem should be resolved with lib version 2016.1.125.