[Solved]How to fix error when posting a comment?

Please see screen shot, when I add new comment, it will prompt the alert window, but my comment could be added in. In the log, shows below error msgs, please advise. And I'm running on 1219.

After upgrade to 1230, it is working fine now.

    /home/osqa/osqa-server/forum/views/decorators.py TIME: 2012-02-17 22:07:02,097 MSG: decorators.py:command:73 comment: Reverse for 'user_profile' with arguments '()' and keyword arguments '{'slug': u'billrain'}' not found.
/home/osqa/osqa-server/forum/views/decorators.py TIME: 2012-02-17 22:07:02,098 MSG: decorators.py:command:74 Traceback (most recent call last):
  File "/home/osqa/osqa-server/forum/views/decorators.py", line 57, in command
    response = func(request, *args, **kwargs)
  File "/home/osqa/osqa-server/forum/views/commands.py", line 282, in comment
    id, comment.id, comment.comment, user.decorated_name, user.get_profile_url(),
  File "/usr/local/lib/python2.7/dist-packages/Django-1.3.1-py2.7.egg/django/db/models/__init__.py", line 35, in inner
    return reverse(bits[0], None, *bits[1:3])
  File "/usr/local/lib/python2.7/dist-packages/Django-1.3.1-py2.7.egg/django/core/urlresolvers.py", line 391, in reverse
    *args, **kwargs)))
  File "/usr/local/lib/python2.7/dist-packages/Django-1.3.1-py2.7.egg/django/core/urlresolvers.py", line 337, in reverse
    "arguments '%s' not found." % (lookup_view_s, args, kwargs))
NoReverseMatch: Reverse for 'user_profile' with arguments '()' and keyword arguments '{'slug': u'billrain'}' not found.