Comment 3 for bug 1179975

I can't upgrade from ubuntu 13.04 to 13.10 due to a similar error...

felisuco@felisuco-E500-U-AP50B:~$ do-release-upgrade -d
Comprobar si hay una nueva versión de Ubuntu
Obtener:1 Firma de la herramienta de actualización [198 B]
Obtener:2 Herramienta de actualización [1.203 kB]
Obtenidos 1.203 kB en 0seg. (0 B/s)
autentificar «saucy.tar.gz» contra «saucy.tar.gz.gpg»
extrayendo «saucy.tar.gz»

Leyendo caché

Ha ocurrido un error fatal

Informe de este fallo e incluya los archivos
/var/log/dist-upgrade/main.log y /var/log/dist-upgrade/apt.log en el
informe. La actualización ha sido cancelada.
Su archivo sources.list original se guardó en
/etc/apt/sources.list.distUpgrade.

Traceback (most recent call last):

File "/tmp/ubuntu-release-upgrader-00xuto/saucy", line 10, in
<module>
sys.exit(main())

File
"/tmp/ubuntu-release-upgrader-00xuto/DistUpgrade/DistUpgradeMain.py",
line 240, in main
save_system_state(logdir)

File
"/tmp/ubuntu-release-upgrader-00xuto/DistUpgrade/DistUpgradeMain.py",
line 133, in save_system_state
scrub_sources=True)

File "/tmp/ubuntu-release-upgrader-00xuto/DistUpgrade/apt_clone.py",
line 149, in save_state
self._write_state_sources_list(tar, scrub_sources)

File "/tmp/ubuntu-release-upgrader-00xuto/DistUpgrade/apt_clone.py",
line 241, in _write_state_sources_list
"./etc/apt/sources.list.d/"+source)

File "/tmp/ubuntu-release-upgrader-00xuto/DistUpgrade/apt_clone.py",
line 252, in _add_file_to_tar_with_password_check
source_copy.write(line)

UnicodeEncodeError: 'ascii' codec can't encode character u'\xf3' in
position 106: ordinal not in range(128)