The upgrader tool failed

Binary package hint: update-manager

A popup window with the title "Installer crashed" was displayed with info below. I was included /var/log/dist-info/main.log and /var/log/dist-info/apt.log.
I don't know if this information is useful but this happened immediatly after I was asked to keep/replace /etc/modprode.d/blacklist. I clicked the replace button.
Some other potentially useless info is that I had been away from the computer for maybe 2 hours and when I came back the upgrader was waiting for my response.
One last thing, in the Upgrader window, the text just above the console was showing strange characters instead of accented characters (the character encoding was fine in the console window).

Traceback (most recent call last):
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/dist-upgrade.py", line 48, in ?
    app.run()
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/DistUpgradeControler.py", line 844, in run
    self.fullUpgrade()
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/DistUpgradeControler.py", line 826, in fullUpgrade
    if not self.doDistUpgrade():
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/DistUpgradeControler.py", line 534, in doDistUpgrade
    res = self.cache.commit(fprogress,iprogress)
  File "/usr/lib/python2.4/site-packages/apt/cache.py", line 204, in commit
    if res == pm.ResultCompleted:
  File "/usr/lib/python2.4/site-packages/apt/cache.py", line 179, in installArchives
    installProgress.finishUpdate()
  File "/usr/lib/python2.4/site-packages/apt/progress.py", line 217, in run
    os._exit(res)
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/DistUpgradeViewKDE.py", line 259, in waitChild
    self.updateInterface()
  File "/tmp/kde-root/adept_updaterQvclgb.tmp-extract/DistUpgradeViewKDE.py", line 281, in updateInterface
    logging.warning("no activity on terminal for %s seconds (%s)" % (self.TIMEOUT_TERMINAL_ACTIVITY, self.label_status.text()))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 25-26: ordinal not in range(128)