Propertybox Apply handler called twice??

[Andrew King <kingos optushome com au>]

Hi everyone,

I have used the following code to connect the apply button of a 
propertybox to its signal handler.
gtk_signal_connect (GTK_OBJECT (propertybox2), "apply",
                    GTK_SIGNAL_FUNC (on_propertybox2_apply),
                    NULL);

However, I have a simple print statement inside the handler, and it is 
evident that the handler is getting
called TWICE every time apply is pressed. (This is also the same for okay).

Can anyone help?

Why is this happening?

Thanks,
Andrew.