F15 Pygtk2-Glade3 problem

[Steven I Usdansky]

Encountering errors trying to create a simple gui using pygtk2 with

glade3. Top-level window is created and displays properly. When I add
a box (no more VBox and Hbox) and attempt to display the window with
its box, I get the error:

vlcgtk.py:19: Warning: cannot create instance of abstract
(non-instantiatable) type `GtkBox'
self.builder.add_from_file("vlcgtk.glade")
Segmentation fault (core dumped)

glade3-3.10.0-1.fc15.x86_64
pygtk2-libglade-2.24.0-1.fc15.x86_64

No problem if I manually change GtkBox to GtkVBox in the glade file.
It's clearly bugzilla time, but against which component?
-- 
Steve Usdansky