Has anyone had an issue with a custom pane and the IsVisible attribute. I have a button that launches a dock pane, if that pane is already launched Pane.IsVisible, then it doesn't relaunch it. The pane also has a save button on it, that when clicked, closes the Pane if it is Pane.IsVisible. In 2.2 the IsVisible attribute is always false. Do I need to manage this attribute on my own or has there been a change to the DockPane API.