Problem with spinbutton and dialog response via shortcut

[Michael Ekstrand <mekstran scl ameslab gov>]

I have a dialog with an entry and a spin button (to enter hostname  
and port), created with Glade.  The code grabs the values of the  
entry and spin button when Gtk::Dialog::run returns  
Gtk::RESPONSE_OK.  Most of the time this works just fine.  The user  
can adjust with the mouse, type in the entry, click OK, or hit enter  
with keyboard focus in either the entry or the spin button and the  
program behaves correctly.

However, if I type in a new value in the spin button and then press  
Alt-O to activate the OK button via its underlined letter, the code  
reading the values does not get the new value of the spin button - it  
gets the old value before the user typed.

What's going on with this, and what what can I do to correct it?

FWIW I'm using GTK+ 2.8.20 through GTKmm 2.8.8 on Debian Etch.

Thanks,
Michael