> 2. This program still uses Fl_Pack. I had originally tried Fl_Pack to
> see what it would do. When changed over to Fl_Group, buttons lower in
> the window don't respond properly. It seems like the clicked button and
> above are the only responding buttons. I quit playing with Fl_Group
> since I couldn't remedy the unpredictable buttons.

Sounds like you have put the buttons outside the bounding box of the group, so 
they don't get any key clicks.

You need to ensure the parent group is sized to properly contain its children, 
or Bad Things can happen.

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