Traceback (most recent call last):
  File "/srv/staging.launchpad.net/staging/launchpad/cronscripts/../lib/canonical/launchpad/components/externalbugtracker.py", line 336, in updateBugWatches
    self.importBugComments(bug_watch)
  File "/srv/staging.launchpad.net/staging/launchpad/cronscripts/../lib/canonical/launchpad/components/externalbugtracker.py", line 869, in importBugComments
    bug_message = self._importDebBugsComment(comment, bug_watch)
  File "/srv/staging.launchpad.net/staging/launchpad/cronscripts/../lib/canonical/launchpad/components/externalbugtracker.py", line 924, in _importDebBugsComment
    parsed_message=parsed_comment)
  File "/srv/staging.launchpad.net/staging/launchpad/lib/canonical/launchpad/database/message.py", line 332, in fromEmail
    content = content.decode(charset, 'replace')
LookupError: unknown encoding: unknown-8bit