It appears that the conditions under which OnPropertyChanged() is called have changed somewhere between versions 6.1.2.1 and 6.1.3.1.  

How do I get the OnPropertyChanged() calls to behave as they did in 6.1.2.1?

        public static Person Create(iCatalystEntityManager manager)
        {
            Person person = manager.CreateEntity<Person>();
            person.PersonId = Guid.NewGuid(); 

            person.MaritalStatusId = _defaultMaritalStatusId; // in 6.1.2.1 this would produce an OnPropertyChanged() call; in 6.1.3.1 it does not.

            person.EntityAspect.AddToManager();

            person.IsNewAndUnchanged = true;

            return person;
        } 

   protected override void OnPropertyChanged(PropertyChangedEventArgs e)
        {
            base.OnPropertyChanged(e);

            // Update properties that need refresh as a side-effect of some other properties changing...               }