My FindFullMatchIndex method returns -1 when an item is not found. Instead of selecting no items and leaving the scroll position where it's at like the default search text behavior; the combobox scrolls the list to the top and selects the first item in the list.

This happens only with editable ComboBox in Silverlight.

RadComboBox with bound ItemsSource and SelectedValue to the DataContext. When the DataContext is changed and the new DataContext ItemsSource does not contain the currently selected item, the old DataContext SelectedValue is set to null. This problem does not occur in WPF.

When the ItemsSource for a RadComboBox is bound to a collection with two different properties, id and ID.  When I bind SelectedValuePath to one of the properties, changing selection throw error:  "Ambiguous match found" exception.

When moving through elements(checkbox+ text) in RadCombobox with the keyboard, focus of combobox is not changed as expected.
Sample project attached.