Hi Roger, thank you for the quick response.
I've tried your suggestions but I hasn't been successful. I think that the problem is related to extraction of titles and authors of songs. The song page looks correctly with UTF-8, but song book page (containing the index of songs) shows an interrogation mark instead of the right extended characters. Forcing encoding with browser options doesn't solved the problem.
Anyway it is a minor problem that doesn't prevent me from enjoying with Chordie.
regards
Freduki