Opa, Não sei o que mudou no Debian, mas desde o Squeeze eu coloco um HD externo formatado em NTFS e aparece esse erro:
Error mounting: mount exited with exit code 1: helper failed with: Mount is denied because setuid and setgid root ntfs-3g is insecure with the external FUSE library. Either remove the setuid/setgid bit from the binary or rebuild NTFS-3G with integrated FUSE support and make it setuid root. Please see more information at http://tuxera.com/community/ntfs-3g-faq/#unprivileged obs: meu usuário já está no grupo 'fuse'.

