Enhance aggregate functions (like Sum) in footers so they support expression columns in RadGridView. 

See the attached project. It works for DataColumn, but raises an exception that no suitable generic Sum method could be found when I set the Sum footer for an expression column.

The same works fine with the old Nested mode.

It's so strange that Telerik's components don't support such basic mechanics of WPF...

When TabStopMode is set to "Skip" on all columns and you press Tab, RadGridView scrolls a little.

Workaround: define a custom KeyboardCommandProvider and clear the pending commands.

The group panel item image of a column with custom header is blurred

When the ScrollMode is set to Deferred, then only the vertical ScrollBar shows a position indicator. The same is requested on horizontal scrolling.

gridviewdatacolumn distinct filter does not respect culture when displaying dates.

All the other display do display the correct format

Using Telerik GridView. If a cell is wrapped multi-lines (the more lines the easier to reproduce), and the grid has both vertical and horizontal scrollbars. 
1) Fill one of the cells with a bunch of text in which will cause multi-line text wrapping of within that column.
2) Set focus to a different grid row
3) scroll the vertical scrollbar all the way to the bottom
4) scroll the horizontal scrollbar far enough away to lose visual of the Column
5) scroll the horizontal bar back to the right
Result: the vertical scrollbar will jump.
Expected: The scrollbars should not jump like this as it does not happen when the cell does not contain word-wrapped text.

Workaround is to specify that the format string should contain only the required member path:

<telerik:GridViewDynamicHyperlinkColumn Header="ID" DataMemberBinding="{Binding ID}" NavigateUrlMemberPaths="WebUrl" NavigateUrlFormatString="{} {0}"  TargetName="_blank"/>

There is a mistake in the text shown in the GroupPanel of RadGridview in french.
it should be something like "Glissez un en-tête de colonne et déposez-le ici.."