Implicit row's style should be not cleared when the SelectStyle method of RowStyleSelector returns null.

It does not matter if the button is in a CellTemplate, CellEditTemplate, ControlPanelItem etc.

To work around the issue, set the EnableColumnGroupsVirtualization property of RadGridView to True.

Tapping on GridViewGroupRow or GroupHeaderRow does not expand the group

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

There are two different styles for the Validation Message - the Microsoft's and the Telerik's.

Scrollbar scrolls unexpectedly when column width is changed. Check the following video for a reference:
http://screencast.com/t/Y6IwtREc

WPF Controls Samples -> GridView with Data Virtualization -> Edit UnitPrice and press Enter -> press ESC -> press Control+End.

Workaround: press ESC one more time or commit the edit before pressing  Control+End.
* works fine with QueryableCollectionView.

When a SortDesciptor is applied and items are modified, the selection behaves inconsistently:

1. If an item is modified, so it's position needs to be changed according to the sorting descriptor, it will be removed from the SelectedItems.
2. If an item is modified, but it's position should remain the same, it remains in the SelectedItems collection.
2a. If IsSynchronizedWithCurrentItem item is set to true and the position should remain the same, the item is removed from the SelectedItems and the one that goes in the same position is added to the collection.

Workaround is to add the item back to the SelectedItems collection when RowEdit ends.

private void clubsGrid_RowEditEnded(object sender, GridViewRowEditEndedEventArgs e)
{
    (e.Source as RadGridView).SelectedItems.Add(e.NewData as Club);
}