Provide an option to group a column which is based on an enum by the enum value, but display the DescriptionAttribute or DisplayNameAttribute if existing.
So many times you have sort/group a column by its value like 1,2,3 but display the Description like "Delivery", "Ready", "Pickup". Of course I could add a column to my class which presents the DescriptionAttribute, but then grouping/sorting is wrong: "Delivery", "Pickup", "Ready". It would by much easier if there is an option like "UseDescription". There is something similar with Teleriks "EnumDataSource" which IS using the Description or DisplayName so it should not be that hard to implement the same logic for RadGridView.

GridViewDataColumn doesn't respect FallbackValue when the source property returns DependencyProperty.UnsetValue

The functionality is documented at http://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/icolumn-filter-descriptors and for the time being the functionality can be achieved by implementing an attached behavior. 

I would like to be bale to modify at once several cells of a GridViewComboBoxColumn, when using the common ItemsSourceBinding for all rows (in my GridView, the selection ​is: SelectionMode="Multiple" SelectionUnit="FullRow").
So I would like for the selected rows to apply the same value as the edited cell.

A kind of a workaround for the user: resize any column/the entire window or collapse the row details.

The issue seems to be a bug with UI Row Virtualization since once I set it to False, it did not occur any more. You can also refer to the documentation on UI Virtualization: http://docs.telerik.com/devtools/wpf/controls/radgridview/features/ui-virtualization.html

The RowStyleSelector is great for dynamically styling rows, but there doesn't seem to be an easy way to dynamically apply a style to selected rows - they just take on the default style. Something like a SelectedRowStyleSelector would be a great way to dynamically style selected rows. Thanks!

WinForms: http://www.telerik.com/help/winforms/gridview-grouping-setting-groups-programmatically.html

You can find our online documentation on a detailed information on the currently supported grouping:
http://docs.telerik.com/devtools/wpf/controls/radgridview/grouping/basics.html