during the stratup of version 1.4.8 on XP(French) I got this error :

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Python25\lib\site-packages\roundup\scripts\roundup_demo.py", 
line 8,
in <module>
    from roundup import admin, configuration, demo, instance
  File "C:\Python25\lib\site-packages\roundup\admin.py", line 26, in 
<module>
    from roundup import date, hyperdb, roundupdb, init, password, token
  File "C:\Python25\lib\site-packages\roundup\date.py", line 34, in 
<module>
    from roundup import i18n
  File "C:\Python25\lib\site-packages\roundup\i18n.py", line 222, in 
<module>
    translation = get_translation()
  File "C:\Python25\lib\site-packages\roundup\i18n.py", line 212, in 
get_transla
tion
    translator = translation_class(open(mofiles[0], "rb"))
  File "C:\Python25\lib\gettext.py", line 180, in __init__
    self._parse(fp)
  File "C:\Python25\lib\gettext.py", line 337, in _parse
    tmsg = unicode(tmsg, self._charset)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 192-
194: invalid data

How can I fix it ?