ComboBox: When ItemTemplate of RadComboBox is set at runtime (after ItemsSource and SelectedValue properties), SelectionBoxItemTemplate is not updated
The issue can be reproduced also with the standard ComboBox:
https://connect.microsoft.com/VisualStudio/feedback/details/663870/wpf-4-0-combobox-itemtemplate-and-selectionboxitemtemplate-when-itemtemplate-is-bound#details