multilingual=true crashes

edit

On askbot 0.7.49 , we are seeing this crash on turning multilingual=true in settings.py

    [Thu Nov 14 14:05:49 2013] [error]
 mod_wsgi (pid=31744): SystemExit exception raised by WSGI script '/usr/sbin/askbot.wsgi' ignored.
 Traceback (most recent call last):
   File "/usr/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 219, in __call__
     self.load_middleware()
   File "/usr/lib/python2.6/site-packages/django/core/handlers/base.py", line 45, in load_middleware
     mod = import_module(mw_module)
   File "/usr/lib/python2.6/site-packages/django/utils/importlib.py", line 35, in import_module
     __import__(name)
   File "/usr/lib/python2.6/site-packages/askbot/middleware/view_log.py", line 7, in <module>
     from askbot.models import signals
   File "/usr/lib/python2.6/site-packages/askbot/models/__init__.py", line 2, in <module>
     startup_procedures.run()
   File "/usr/lib/python2.6/site-packages/django/db/transaction.py", line 224, in inner
     return func(*args, **kwargs)
   File "/usr/lib/python2.6/site-packages/askbot/startup_procedures.py", line 1061, in run
     sys.exit(1)
 SystemExit: 1

Please check.