The issue occurs when using a BindingSource bound to a DataSet as DataSource for combo box columns in RadGridView.

RadGridView does not clear the GridSpinEditor value when navigating to another cell.

RadGridView. Incorrect behavior of arrow keys when RightToLeft is enabled.

Save\Load functionality of the control should work with ColumnGroupsViewDefinition.

When switching from a child view that does not contain rows to one containing rows, the child view size is not updated and no child rows are shown.

If you go to The Demos >> Grid View >> Performance >> Load 50,000 rows. And then drag the group to group by the first two columns, then editing cells is slow.

RadGridView can not change the current column (by using the IsCurrent of the desired column) in the CurrentColumnChanged event.

The issue may be releated to measure layout logic.

Ticked ID: 381352
One thing more I noticed.
Actually I do not think, this issue is a sorting issue, but rather some rendering issue, where the old version is much faster than the new one. 
If you compare the scrolling performance between the new and the old version, also here the old version is significantly faster.
So I think this is a more general issue, something with the rendering - or what you call it - of the visible part of the grid, which are faster in the old version.
Am I the only customer noticing this ?

steps to reproduce: 

1- Apply filter in a date column by choosing Between. 

2- Leave default settings (change dates) and confirm 

3- Save layout 

4- Close the form 

5- Open the form and load the layout 

forum: http://www.telerik.com/community/forums/winforms/gridview/save-load-layout-issue.aspx#1475412 

RadGridView does not handle nullable DateTime objects correctly.

IIF function in Expression for calculated columns does not work.

Provide calculation of the 'Ceiling' function in a column expression:
column.Expression = "Ceiling(ColumnName)";

RadGridView does not update its UI when a new item is added to/remove from its child BindingList collection or a property of the child object is edited (INotifyPropertyChanged is implemented for the child object).

Comments: We will not support the case when adding/removing items and object relational hierarchy is used.

When Excel-like filtering dialog is used without explicitly setting the filter operation the filter dialog executes Contains operation and when the filtering is confirmed through the OK button, RadGridView executes Equals operation.

Comment: the issue is not the equals operations, the problem is that we escape the '*' characters.

The issue appears when the form with the RadGridView control is minimized and the DataSource of the control is changed from 'null' to some value.

When grouping in RadGridView is performed, the best fit operation throws NullReferenceException.

Delete from BindingList lists bound to master and child templates. Invalid batch operation

While RadGridView is resized, the active combobox editor is placed in columns that are not current.

When date time filtering is performed for NotEqualTo or GreaterThanOrEqual operator, the filtered rows do not obey the filter's condition.

TextAllignment setting is not accepted neither through theme or through ViewCellFormatting event.