[glade--]weird fake widget with unfilled event boxes

I get similar errors with unfilled eventboxes (I want to fill them in by hand later which is why I'm leaving them empty), except it also creates a fake label too (mainWindow_glade.cc):

   Gtk::Label *WidgetqmJcDHQ = manage(new class Gtk::Label(" WidgetqmJcDHQ"));
   Gtk::Label *WidgetqCNcDHQ = manage(new class Gtk::Label(" WidgetqCNcDHQ"));
   eventbox2->add(*WidgetqmJcDHQ);
   eventbox3->add(*WidgetqCNcDHQ);
   WidgetqmJcDHQ->show();
   WidgetqCNcDHQ->show();

Mark