Commented Unassigned: TimePicker Edit Style causes dropdown listbox to display Xceed.Wpf.Toolkit.TimeItem [21838]

When I edit a copy of the style (without making any changes to the style), TimePicker dropdown listbox displays "Xceed.Wpf.Toolkit.TimeItem" for each item. Selection still provides appropriate selected value. Example attached.
Comments: ** Comment from web user: BoucherS **

Hi,

I tried what you say in Blend 2012. Added a reference to Xceed.Wpf.Toolkit.dll (v2.4), added a TimePicker, create a copy of the Template and Run the App. The popup of the TimePicker contains correct time data.