Menu Implementation problem

["MERT TUGCU" <merttugcu hotmail com>]

Dear All,

I have a program, which has a menu implementation. It works fine except when 
I quit, I get several warnings and sometimes segmentation fault. It seems 
that the menu objects are not destroyed properly. Would you please let me 
know, what I am doing wrong here? Thanks.
Here is my menu implementation:

//Fill main menu bar
menuBar.items().push_back(Gtk::Menu_Helpers::MenuElem("File",fileMenu));
menuBar.items().push_back(Gtk::Menu_Helpers::MenuElem("Memory",memoryMenu));
//File menu:
{
	Gtk::Menu::MenuList& menulist = fileMenu.items();
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("Load", 
trainingData_submenu) ); //Add submenu.
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("Save Training Data", \
		sigc::mem_fun(*this, &InterfaceWindow::on_menu_saveTree) ) );
	menulist.push_back( Gtk::Menu_Helpers::StockMenuElem(Gtk::Stock::QUIT, \
		sigc::mem_fun(*this, &InterfaceWindow::on_menu_quit) ) );
}
//Memory menu:
{
Gtk::Menu::MenuList& menulist = memoryMenu.items();
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("Clear", \
		sigc::mem_fun(*this, &InterfaceWindow::on_menu_clear) ) );
}
//File|Load Submenu:
{
	Gtk::Menu::MenuList& menulist = trainingData_submenu.items();
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("Training Data", 
fileMenu_Load_submenu) ); /Add submenu.
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("WM Network 
Weights",sigc::mem_fun(*this, InterfaceWindow::on_menu_load_WM_Network) ) );
}
//File|Load|Training Data Submenu:
{
	Gtk::Menu::MenuList& menulist = fileMenu_Load_submenu.items();
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("All(default)", \
	sigc::mem_fun(*this, &InterfaceWindow::on_menu_loadDefault) ) );
	menulist.push_back( Gtk::Menu_Helpers::MenuElem("From file", \
	sigc::mem_fun(*this, &InterfaceWindow::on_menu_loadFromFile) ) );
}