How to set a radiobutton... addendum

["Daniel M. German" <dmg csg uwaterloo ca>]

Hi everybody, 

I have a digged a little bit more into my problem and I have another two
questions,

1. why a 

gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(ggv->zoom_menu[i]),
                                                       TRUE);

generates two callbacks. One with the current selected value of the
group of radio buttons and one with the new value? 

2. How do I set the default value of a set of radio buttons when first
   created?

Thanks for any help!

--
Daniel M. German                  "Language alone protects us from the scariness
                                   of things with no names.
   Toni Morrison ->                Language alone is meditation. "
http://turingmachine.org/
dmg@csg.uwaterloo.ca