In my class, I declare both a Gtk::Adjustment and a Gtk::SpinButton.  If I
declare the Gtk::SpinButton before I declare a Gtk::Adjustment, I get a
segfault.  But if I reverse them (declare the adjustment first), then the
program runs fine:

This below causes a segfault, but like I said, in the class, declaring the
Adjustment first causes this to work.

class PTab : public Gtk::VBox
{
  public:
    PTab();
    virtual ~PTab();
  protected:
    Gtk::SpinButton m_SButton;
    Gtk::Adjustment m_Adjust;
};

PTab::PTab()
  :
  m_Adjust(0.0, -360.0, 360.0, 1.0, 10.0, 0.0),
  m_SpinButton(m_Adjust)
{

}

//
Running RedHat 7.2 with custom built:
gtk+-2.2.1
gtkmm-2.2.0

/Line72