1) New WPF interface property PersistenceEnabled. Default False, set to True if using chart inside a complex container such as Telerik Rad Dock or other container that destroys and re-creates controls as part of their user interface. ProEssentials defaults to not persist as the chart may contain large amounts of data. It's recommended to only set this property True if necessary (control is being reset to default 4 data points as part of user interface action.)
2) See the New v9 Features topic within the help system for new information related to version 9.