How to get multiple instances of a menubar using GtkUIManager

[Davide G. García <neuralcrack hotmail com>]

Hi,

I'm developing a program which consists on a parent window, that makes 
operations like Save All, and Quit, and child windows that have a menubar to 
operate on its contents, just like The GIMP, for example.
Now what I want to know is if I can get multiple instances of the same 
menubar. I mean, using the same menubar definition. I've tried using 
gtk_ui_manager_get_widget() several times, but I ran into problems.
When I create a child window, get the menubar with 
gtk_ui_manager_get_widget(), and put it in a table row inside the child 
window, it happens that in the first window created, it works, but on the 
next ones, it gives a warning when I do a gtk_table_attach(). Something 
like:
gtk_table_attach(): GTK assertion failed: child->parent == NULL

(I'm not pretty sure of it, because I'm not at home right now, sorry. I'll 
post some code when I get home, if you guys need it.)
I thought that it was a bug: may the widget get orphan by some strange 
thing.
I tried to reparent it using gtk_window_reparent(), but doesn't work at all.

How can I make it work?

Thanks in advance.

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