[MacRuby-devel] Starting a New Project tutorial

I'm following the steps to Starting a New Project at http://www.macruby.org/trac/wiki/MacRubyTutorial, which says: First, let's instantiate our class. In the Library pane, drag-and-drop an NSObject item to the main window. Then, make sure you selected it, and open the inspector pane (click on Window, then Document Info). In the Object Identity tab, select MyController as the object class. But after dragging and dropping an NSObject into the MainMenu.nib window, Document Info shows nothing in the Object ID panel. OS 10.5.6 Xcode 3.1.2 ruby 1.9.1p0 MacRuby 0.4