Yup, I do know it's not working .
That's the XML file for the GTK UI Manager (a description of the user interface: the toolbar buttons and the menus) and it's missing in the package I've built.

The issue is, this is "bleeding edge" stuff :P
And you should not use it on your tablet, it may even destroy some or all of your files.

The Maemo Extras repository is not intended for the regular user.

Thanks for reporting it, even tho I knew it.

However when Xournal for Diablo will be announced, a proper bugzilla page will also be ready to accept bugs and enhancements.