Django makemessages errors Unknown encoding "utf8"

I installed python separated from yum.

Now, I need to recompile the language pack for the OSQA system, but get this message:

Error: errors happened while running xgettext on __init__.py
xgettext: ./Django-1.2.3/tests/regressiontests/views/__init__.py:1: Unknown encoding "utf8". Proceeding with ASCII instead.
xgettext: Non-ASCII string at ./Django-1.2.3/tests/regressiontests/views/__init__.py:7.
          Please specify the source encoding through --from-code or through a comment
          as specified in http://www.python.org/peps/pep-0263.html.

I tried to set encode at utf-8 in the manage.py file but it didn't work.

Can someone help me to solve this issue?