The issue is reproducible with Q1 2015 SP1 version. With Q1 2015 it is not.
In order to reproduce it, add at least one empty cell. When you try opening the excel file you get the an error that Excel will try to recover the file.

Should be resolved with LIB version 2015.1.413.

* Workaround: commit the edit before removing the item
* Works fine with the old Nested mode

Would you please confirm the following bug? When selecting multiple rows of a *child* RadGridView, with multiple rows having optional nested RadGridViews, scrolling off the content of the WPF app causes the selection of those child grid rows to become unselected after scrolling back to the main selection of the child grid. If you must require a demo in order to get this feature fixed I might be able to extract one based our production application, but basically we have a Telerik grid control with nested grids that we want to maintain child selections on.

Thank you,
John Wilkins

The issue is replicated only when a filtering operation is applied. For a grouping and sorting one it is not. This behavior is replicated in WPF only.

InvalidOperationException is thrown from the synchronizing of the pinnedItems state when the ItemsSource collection of RadGridView is changed by asynchronous operations.

Available in LIB version 2017.1.213 , it will be also available in the R1 2017 SP1 Release.

Currently all of the MoveCurrentTo methods rely on the internal logic of MoveCurrentToPositionCore and users cannot override it through inheritance.

It is difficult to track whether the newly added items are pasted or not crated by insert.

InvalidCastException is thrown when the DropIndicatorThickness property of the GridViewHeaderCell is set. Or whenever the DropIndicatorBrush property is accessed. This happens when using the Windows 7 theme. Also, the EnableColumnVirtualization property should be set to False.

System.InvalidCastException: 'Unable to cast object of type 'System.Windows.Media.LinearGradientBrush' to type 'System.Windows.Media.SolidColorBrush'.'

To work this around, you can use an implicit style targeting the GridViewHeaderCell in order to set its DropIndicatorBrush to a SolidColorBrush value.

 <telerik:RadGridView.Resources>
     <Style TargetType="telerik:GridViewHeaderCell">
         <Setter Property="DropIndicatorBrush" Value="White" />
         <Setter Property="DropIndicatorThickness" Value="10" />
     </Style>
 </telerik:RadGridView.Resources>

The problem should be resolved with lib version 2016.1.125.

StackOverFlowException when the GroupMemberPath is set to a different path to the data member and the column is grouped, and filtered.

As an example I add a column to the grid:
columns.Add(new GridViewDataColumn() { DataMemberBinding = new Binding("CustomerId"), GroupMemberPath = "CustomerName", SortMemberPath="CustomerName", Width = 300 });

When the grid appears, drag the CustomerId column to the grouping area
Click the filter icon on the CustomerId column
Click a checkbox in the filtering control to select an item
Exception occurs

Workaround:

Define an implicit Style targeting GridViewRow UI element under Window.Resources or RadGridView.Resources section.

It should be resolved with lib version 2015.1.504.