Checking for a new Ubuntu release
Get:1 Upgrade tool signature [198 B]
Get:2 Upgrade tool [1,201 kB]
Fetched 1,201 kB in 6s (34.7 kB/s)
authenticate 'raring.tar.gz' against 'raring.tar.gz.gpg'
extracting 'raring.tar.gz'

Reading cache


A fatal error occurred

Please report this as a bug and include the files
/var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
your report. The upgrade has aborted.
Your original sources.list was saved in
/etc/apt/sources.list.distUpgrade.

Traceback (most recent call last):

File "/tmp/ubuntu-release-upgrader-2fpa89/raring", line 10, in
<module>
sys.exit(main())

File
"/tmp/ubuntu-release-upgrader-2fpa89/DistUpgrade/DistUpgradeMain.py",
line 237, in main
save_system_state(logdir)

File
"/tmp/ubuntu-release-upgrader-2fpa89/DistUpgrade/DistUpgradeMain.py",
line 130, in save_system_state
scrub_sources=True)

File "/tmp/ubuntu-release-upgrader-2fpa89/DistUpgrade/apt_clone.py",
line 147, in save_state
self._write_state_installed_pkgs(sourcedir, tar)

File "/tmp/ubuntu-release-upgrader-2fpa89/DistUpgrade/apt_clone.py",
line 177, in _write_state_installed_pkgs
cache = self._cache_cls(rootdir=sourcedir)

File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 102, in
__init__
self.open(progress)

File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 145, in
open
self._cache = apt_pkg.Cache(progress)

SystemError: E:Encountered a section with no Package: header,
E:Problem with MergeList
/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_quantal_restricted_i18n_Translation-en%5fUS,
E:The package lists or status file could not be parsed or opened.