locale UTF-8 error

I am following the tutorial part 2 and when creating a superuser once the login prompt is showing (after executed python manage.py run server ).  I am using python 2.7.2 for Mac OS 10.7.3, Django 1.4 and I get the following error: 

python manage.pcreatesuperuser --username=horacio --email=horacio.mx@gmail.com

Traceback (most recent call last):

  File "manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line

    utility.execute()

  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 382, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv

    self.execute(*args, **options.__dict__)

  File "/Library/Python/2.7/site-packages/django/core/management/base.py", line 232, in execute

    output = self.handle(*args, **options)

  File "/Library/Python/2.7/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 70, in handle

    default_username = get_default_username()

  File "/Library/Python/2.7/site-packages/django/contrib/auth/management/__init__.py", line 105, in get_default_username

    default_username = get_system_username()

  File "/Library/Python/2.7/site-packages/django/contrib/auth/management/__init__.py", line 85, in get_system_username

    return getpass.getuser().decode(locale.getdefaultlocale()[1])

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/locale.py", line 496, in getdefaultlocale

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/locale.py", line 428, in _parse_localename

ValueError: unknown locale: UTF-8

Has some got something similar and have a solution for this?

Thanks in advanced.

.. HMA.

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