OpenERP 7.0 Backup Issue TypeError: Expected bytes

Hello,

Traceback (most recent call last):
  File "/Users/opalam/OpenERP/web/addons/web/http.py", line 285, in dispatch
    r = method(self, **self.params)
  File "/Users/opalam/OpenERP/web/addons/web/controllers/main.py", line 815, in backup
    {'fileToken': int(token)}
  File "/Users/opalam/OpenERP/web/addons/web/http.py", line 332, in make_response
    response.set_cookie(k, v)
  File "/Library/Python/2.7/site-packages/werkzeug/wrappers.py", line 960, in set_cookie
    self.charset))
  File "/Library/Python/2.7/site-packages/werkzeug/http.py", line 905, in dump_cookie
    value = to_bytes(value, charset)
  File "/Library/Python/2.7/site-packages/werkzeug/_compat.py", line 106, in to_bytes
    raise TypeError('Expected bytes')
TypeError: Expected bytes

I am facing bug when I am going to export database or can say backup the database.

Please fill your idea or patch to resolve this issue.

Thanks,
Kettor