pinging of ubuntuone url is done using http address resulting in 403 FORBIDDEN response

Here's what happens:

2010-09-01 00:30:13,775:775.646924973 ubuntu_sso.main Login successful for app 'Ubuntu One', email '<email address hidden>'
2010-09-01 00:30:13,776:776.504993439 ubuntu_sso.main keyring_get_credentials: app_name 'Ubuntu One'
2010-09-01 00:30:13,799:799.949884415 ubuntu_sso.main keyring_get_credentials: Keyring returned credentials? True
2010-09-01 00:30:13,800:800.745010376 ubuntu_sso.main Maybe pinging url http://edge.one.ubuntu.com/oauth/sso-finished-so-get-tokens/ for app_name 'Ubuntu One
'
2010-09-01 00:30:13,804:804.537057877 ubuntu_sso.main Opening the ping url with urllib2.urlopen. Request to: http://edge.one.ubuntu.com/oauth/sso-finished-so
-<email address hidden>
2010-09-01 00:30:14,743:743.753910065 ubuntu_sso.main Problem getting the credentials from the keyring.
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/ubuntu_sso/main.py", line 477, in _login_success_cb
    self._ping_url(app_name, email, creds)
  File "/usr/lib/pymodules/python2.6/ubuntu_sso/main.py", line 511, in _ping_url
    response = urllib2.urlopen(request)
  File "/usr/lib/python2.6/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.6/urllib2.py", line 397, in open
    response = meth(req, response)
  File "/usr/lib/python2.6/urllib2.py", line 510, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.6/urllib2.py", line 429, in error
    result = self._call_chain(*args)
  File "/usr/lib/python2.6/urllib2.py", line 369, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.6/urllib2.py", line 605, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/lib/python2.6/urllib2.py", line 397, in open
    response = meth(req, response)
  File "/usr/lib/python2.6/urllib2.py", line 510, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.6/urllib2.py", line 435, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.6/urllib2.py", line 369, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.6/urllib2.py", line 518, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 403: FORBIDDEN

Here's why:
/usr/share/pyshared/ubuntu_sso/main.py
     58 PING_URL = "http://edge.one.ubuntu.com/oauth/sso-finished-so-get-tokens/"

Setting to https fixes this issue but the server apparently fails to add the token to the db, but that's a different bug report.