[closed] Can't change notification settings

I am running a new OSQA using svn r486. But I can't change my notification settings. I get the following error. Why?

ValueError at /users/1/joseph-turian/subscriptions/
Cannot assign "1": "SubscriptionSettings.user" must be a "User" instance.
Request Method: POST
Request URL:    http://theano.metaoptimize.com/users/1/joseph-turian/subscriptions/
Exception Type: ValueError
Exception Value:    
Cannot assign "1": "SubscriptionSettings.user" must be a "User" instance.
Exception Location: /home/turian/envs/osqa/lib/python2.5/site-packages/django/db/models/fields/related.py in __set__, line 273
Python Executable:  /usr/local/bin/python
Python Version: 2.5.4
Python Path:    ['/home/turian/webapps/osqatheano/projects', '/home/turian/envs/osqa/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg', '/home/turian/envs/osqa/lib/python2.5/site-packages/pip-0.6.3-py2.5.egg', '/home/turian/envs/osqa/lib/python2.5/site-packages/django_debug_toolbar-0.8.3-py2.5.egg', '/home/turian/envs/osqa/lib/python2.5/site-packages/MySQL_python-1.2.3c1-py2.5-linux-i686.egg', '/home/turian/envs/osqa/lib/python2.5/site-packages/South-0.7-py2.5.egg', '/home/turian/envs/osqa/lib/python2.5/site-packages', '/home/turian/lib/python2.5/bzr-1.14.1-py2.5-linux-i686.egg', '/home/turian/lib/python2.5/simplejson-2.0.9-py2.5-linux-i686.egg', '/home/turian/lib/python2.5', '/usr/local/lib/python2.5/site-packages/MySQL_python-1.2.2-py2.5-linux-i686.egg', '/usr/local/lib/python2.5/site-packages/python_memcached-1.43-py2.5.egg', '/home/turian/webapps/allosqa/lib/python2.5', '/usr/local/lib/python25.zip', '/usr/local/lib/python2.5', '/usr/local/lib/python2.5/plat-linux2', '/usr/local/lib/python2.5/lib-tk', '/usr/local/lib/python2.5/lib-dynload', '/usr/local/lib/python2.5/site-packages', '/usr/local/lib/python2.5/site-packages/PIL', '/home/turian/webapps/osqatheano/projects/osqa', '/home/turian/webapps/osqatheano/projects/osqa/forum/markdownext']
Server time:    Sat, 3 Jul 2010 19:42:36 -0400