See screencast. EXEC: launch application wizard and select "Custom Template" tab EXEC: start typing some url ASSERT: the url text field is decorated with an error marker as long as the url is not valid. The same error is show in the title area. EXEC: continue typing until the url is a formally valid url Result: The error disappears in the title area but the error decoration to the text field wont go away. It only disappears if you resize the window.