glade, pixmaps, and buttons

i'm using glade to create the gui in my app. if i set a menu item to be a
stock item then I get this:

** WARNING **: unknown widget class 'GtkPixmapMenuItem'

Gtk-CRITICAL **: file gtkmenushell.c: line 310 (gtk_menu_shell_insert):
assertion `GTK_IS_MENU_ITEM (child)' failed.

If i don't make the menu item a stock item but just have it use a stock
icon i still get:

** WARNING **: unknown widget class 'GtkPixmapMenuItem'

Gtk-CRITICAL **: file gtkmenushell.c: line 310 (gtk_menu_shell_insert):
assertion `GTK_IS_MENU_ITEM (child)' failed.

Can anyone help me with this?
	- Dan

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