[Pharo-users] MessageDialogWindow(s)

Hello, In Pharo 5.0 #50680 MessageDialogWindow new open displays a message box with no text. Should (MessageDialogWindow new text: 'Hello') open work? I get a stack trace on CompositionScanner if I try to set the text. Also, is there a way to display the dialog modally (relative to your application)? Thank you, Rob