Add SelectedItemsSource property which can be bound to a collection in the view model. In this case when the RadListBox is in Multiple/Extender mode, the selection can be manipulate from the ViewModel.

Implement IsSynchronizedWithCurrentItem property in order to disconnect the connection with CollectionViewSource.

When drag and drop and reorder are allowed dropping an item after the last item in the control  requires the drop to be exactly after the last item and there is very little space between the item and the outer border of the ListBox

Scroll button is changing size when grouping is applied (WPF only).

When the control is initially Collapsed setting the SelectedIndex does not update the SelectedItem property of the control and vice versa.

I would like to see the visual feedback (red frame about the control and the error message inside) when the binded property has an error message in a error collection.

The SelectionMode must be Multiple.

Add IsFocused dependency property to the RadListBoxItem of the control.

If a dragged item is not over an existing item of the ListBox control the drop cue is not displayed. By default it should be rendered after the last item in the ListBox control.

Available in the 2014 Q2 Release.

Available in LIB version 2015.3.1019, it will be also available in the 2015 Q3 SP1. Fix provided by the new IsScrollIntoViewEnabled property.

RadListBoxItems looks selected when BusyIndicator is made busy

The SelectionMode must be Multiple.

This happens when using VirtualQueryableCollectionView as the ItemsSource.

Implement a public event that is triggered when selection has been made by the user interaction. This even could be useful when a custom logic should be handled when a user selection has been made in the control but not when the change has come from the ViewModel.