Embedding menus in frames prevents alt+key defaults?

[Tim Christian]

Howdy,

I'm learning how to use Python and Tkinter using Mark Lutz'
_Programming_Python_ (2nd edition) and have run into an odd side
effect.  It may be Tk specific (OT?), but I'll ask here anyway.  Lutz
discusses the relative merits of embedding menus into top level
windows versus frames.  The frames route seems like a good idea for
reusable objects.  However, after I embed menus into frames, I notice
that the menu items, though underlined, are no longer selectable via
the Alt key (eg, Alt+F doesn't bring up the "File" menu, though the
"F" character is underlined).  Is this typical behavior?  Perhaps it's
just a problem under my development platform (Windows 2000, Python
2.1)?

Thanks,
Tim.