E: ttf-opensymbol: state error 66

On a fresh and brand new install of Feisty beta, as i was installing the proposed update :
(in french)
Paramétrage de ubuntu-desktop (1.43) ...
Des erreurs ont été rencontrées pendant l'exécution :
 ttf-opensymbol
E: Sub-process /usr/bin/dpkg returned an error code (1)
Un paquet n'a pas pu être installé. Tentative de récupération :
Paramétrage de ttf-opensymbol (2.2.0-0ubuntu2) ...
Updating fontconfig cache...
/usr/share/fonts: failed to write cache
/usr/share/fonts/X11: failed to write cache
/usr/share/fonts/X11/100dpi: failed to write cache
/usr/share/fonts/X11/75dpi: failed to write cache
/usr/share/fonts/X11/Type1: failed to write cache
/usr/share/fonts/X11/encodings: failed to write cache
/usr/share/fonts/X11/encodings/large: failed to write cache
/usr/share/fonts/X11/misc: failed to write cache
/usr/share/fonts/X11/util: failed to write cache
/usr/share/fonts/truetype: failed to write cache
/usr/share/fonts/truetype/arphic: failed to write cache
/usr/share/fonts/truetype/baekmuk: failed to write cache
/usr/share/fonts/truetype/freefont: failed to write cache
/usr/share/fonts/truetype/kochi: failed to write cache
/usr/share/fonts/truetype/thai: failed to write cache
/usr/share/fonts/truetype/ttf-arabeyes: failed to write cache
/usr/share/fonts/truetype/ttf-bengali-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-bitstream-vera: failed to write cache
/usr/share/fonts/truetype/ttf-dejavu: failed to write cache
/usr/share/fonts/truetype/ttf-devanagari-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-gentium: failed to write cache
/usr/share/fonts/truetype/ttf-gujarati-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-kannada-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-lao: failed to write cache
/usr/share/fonts/truetype/ttf-malayalam-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-mgopen: failed to write cache
/usr/share/fonts/truetype/ttf-oriya-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-punjabi-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-tamil-fonts: failed to write cache
/usr/share/fonts/truetype/ttf-telugu-fonts: failed to write cache
/usr/share/fonts/type1: failed to write cache
/usr/share/fonts/type1/gsfonts: failed to write cache
/usr/share/X11/fonts: failed to write cache
/usr/share/X11/fonts/100dpi: failed to write cache
/usr/share/X11/fonts/75dpi: failed to write cache
/usr/share/X11/fonts/Type1: failed to write cache
/usr/share/X11/fonts/encodings: failed to write cache
/usr/share/X11/fonts/encodings/large: failed to write cache
/usr/share/X11/fonts/misc: failed to write cache
/usr/share/X11/fonts/util: failed to write cache
/usr/local/share/fonts: failed to write cache
/var/lib/defoma/fontconfig.d: failed to write cache
/var/lib/defoma/fontconfig.d/A: failed to write cache
/var/lib/defoma/fontconfig.d/B: failed to write cache
/var/lib/defoma/fontconfig.d/C: failed to write cache
/var/lib/defoma/fontconfig.d/D: failed to write cache
/var/lib/defoma/fontconfig.d/E: failed to write cache
/var/lib/defoma/fontconfig.d/F: failed to write cache
/var/lib/defoma/fontconfig.d/G: failed to write cache
/var/lib/defoma/fontconfig.d/H: failed to write cache
/var/lib/defoma/fontconfig.d/J: failed to write cache
/var/lib/defoma/fontconfig.d/K: failed to write cache
/var/lib/defoma/fontconfig.d/L: failed to write cache
/var/lib/defoma/fontconfig.d/M: failed to write cache
/var/lib/defoma/fontconfig.d/N: failed to write cache
/var/lib/defoma/fontconfig.d/O: failed to write cache
/var/lib/defoma/fontconfig.d/P: failed to write cache
/var/lib/defoma/fontconfig.d/R: failed to write cache
/var/lib/defoma/fontconfig.d/S: failed to write cache
/var/lib/defoma/fontconfig.d/T: failed to write cache
/var/lib/defoma/fontconfig.d/U: failed to write cache
/var/lib/defoma/fontconfig.d/V: failed to write cache
/var/lib/defoma/fontconfig.d/a: failed to write cache
/var/lib/defoma/fontconfig.d/j: failed to write cache
/var/lib/defoma/fontconfig.d/m: failed to write cache
/var/lib/defoma/fontconfig.d/u: failed to write cache
dpkg : erreur de traitement de ttf-opensymbol (--configure) :
 le sous-processus post-installation script a retourné une erreur de sortie d'état 66