This reproduces only if the FlipDuration property of RadBook is set to 0.
To work this around set the FlipDuration to a bigger value. For example: FlipDuration="0:0:0.001"
Example with book-like borders. Due to the radically decreased interest in Silverlight the XAML team decided to considerably reduce the efforts invested in any new features or new components in the UI for Silverlight offering. Hence this request will not be addressed and is marked as declined.
Similar to http://www.charlespetzold.com/blog/2010/06/Flip-Number-Clock-in-Silverlight.html Due to the radically decreased interest in Silverlight the XAML team decided to considerably reduce the efforts invested in any new features or new components in the UI for Silverlight offering. Hence this request will not be addressed and is marked as declined.
In some cases when an item is inserted/removed from the ItemsSource an InvalidOperationException (Element is already the child of another element) is thrown.