Apparently version maemo-5 overwrites data and maps directories. I had them symlinked to MyDocs (from /opt/fheroes2) and the symlinks were replaced by empty directories.

Besides, I'm not able to play any music. I had the music files in ogg format in /opt/fheroes2/files/music (symlinked) but nothing is played.

Apart from that, the game runs perfectly. Thanks.