Problem with the "genre" tag with special characters

@ROSEHAN,
With my RS130, I’ve repeatedly deleted and recreated my database from my audio CD rips to FLAC and tagged them with the MP3Tags application on Windows.
I have a “Synthetiseur” genre, and two albums with the “Synthetiseur” genre appear in the database with a genre containing special characters.
What can I do to ensure they correctly accept the “Synthetiseur” genre?