At last, it works!
I've followed the patient tips and advices Charles gave:
- I've installed csquotes package, and newer biblatex one (Ubuntu
repositories charges the texlive 2007, which is updated);
- I've taken away useless lines in the manual pramble.
Thanks a lot, Charles. A mystery remains: I think I've made exactly the
same as I told in the last message I've sent you, when it was working
well with a tex file made with Texmaker, but not with a Lyx one. So I
don't know exactly what was wrong...?
Cheers,
S.
