Release upgrade 12.10 - kubuntu-netbook could not be installed - Unicode error u'\xbb'

[Wilhelm Wienemann]

On the beginning of my release update to kubuntu 12.10 (from 12.04) I got an error-message:
"kubuntu-netbook" couldn't be installed"

If I close this message, then there where messages that packages must be removed, because there are problems to remove this during the release-update, for example the packages:

kubuntu-desktop
update-manager
update-notifier
update-manager-kde

When I remove this packages individuelly, then I can't upgrade my system. So I installed these packages again.

Trying to start furthermore release-upgrades, unfortunately I got the same error-message again and again.
What are wrong on my system?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please add the log files from '/var/log/dist-upgrade/' to this bug report as separate attachments? Thanks in advance.

[Wilhelm Wienemann (wilhelm-wienemann-d)]

Here are the asked log-files

[Wilhelm Wienemann (wilhelm-wienemann-d)]

Here are the asked log-files

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]

[Sasa Paporovic (melchiaros)]

In apt.log there is a traceback:

Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 846, in emit
    msg = self.format(record)
  File "/usr/lib/python2.7/logging/__init__.py", line 723, in format
    return fmt.format(record)
  File "/usr/lib/python2.7/logging/__init__.py", line 464, in format
    record.message = record.getMessage()
  File "/usr/lib/python2.7/logging/__init__.py", line 328, in getMessage
    msg = msg % self.args
UnicodeEncodeError: 'ascii' codec can't encode character u'\xbb' in position 10: ordinal not in range(128)
Logged from file DistUpgradeCache.py, line 715

[Sasa Paporovic (melchiaros)]

With respect to the circumstances that 3 people has encounterd the problem and that we have a stacktrace I set this to confirmed.