Backspace Icon not Displayed in Native Mac Menus

Hi Jules, I just noticed that the backspace icon is not displayed in a native Mac menu. If I add the same MenuBarModel bar to DocumentWindow menu bar using DocumentWindow::setMenuBar, the icon appears correctly.

Strangely enough, if I add a modifier key such as cmd the icon does appear. Is this a limitation of OSX saying that I shouldn’t use backspace on its own as a shortcut?

(OSX 10.7.5)

I seem to remember there being some kind of problem with the backspace key, but not sure of the exact details. Perhaps it was just that setting the shortcut would flash the menu bar every time you press backspace…