'utf8' codec can't decode byte 0x96 in position 18: unexpected code byte

[dalen@…]

When trying to access: ​http://code.campware.org/projects/campsite/ticket/266

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 206, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 139, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 107, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/ticket/web_ui.py", line 211, in process_request
    self._insert_ticket_data(req, db, ticket, reporter_id)
  File "/usr/lib/python2.4/site-packages/trac/ticket/web_ui.py", line 392, in _insert_ticket_data
    changelog = ticket.get_changelog(db=db)
  File "/usr/lib/python2.4/site-packages/trac/ticket/model.py", line 271, in get_changelog
    for t, author, field, oldvalue, newvalue in cursor:
  File "/usr/lib/python2.4/site-packages/trac/db.py", line 83, in __iter__
    row = self.cursor.fetchone()
  File "/usr/lib/python2.4/site-packages/trac/db.py", line 230, in fetchone
    return row and self._convert_row(row) or None
  File "/usr/lib/python2.4/site-packages/trac/db.py", line 226, in _convert_row
    return tuple([(isinstance(v, unicode) and [v.encode('utf-8')] or [v])[0]
UnicodeDecodeError: 'utf8' codec can't decode byte 0x96 in position 18: unexpected code byte

[Christian Boos]

You have to inform the maintainers of that Trac that they have some bogus content in that ticket - they need to fix it manually in the database.

That was probably some latin1 data created by the trac-post-commit-hook. Recent versions of this hook (for 0.10.x and 0.11dev, but not for 0.9.x) have already been fixed.