I can replicate :-
ubuntu@ubuntu:~$ gnome-about-me
(gnome-about-me:3471): libebook-WARNING **: e-book.c:2245: cannot get book from factory: Invalid source
I can replicate :-
ubuntu@ubuntu:~$ gnome-about-me
(gnome- about-me: 3471): libebook-WARNING **: e-book.c:2245: cannot get book from factory: Invalid source