Comment 11 for bug 998527

I was experiencing this bug, but I solved the issue by re-installing (see last paragraph). My system: Windows 7 Enterprise SP1 (64-bit, English); location Slovenia. Ubuntu One web site worked all along from any browser (IE, Firefox, Chrome, Opera) on the same machine. There was no mention of "Valicert" in my logs, but there were some SSL related errors in my logs, for example:

* sso-client.log:
2012-07-03 10:25:55,470:470.00002861 - ubuntu_sso.account - ERROR - login failed with:
Traceback (most recent call last):
  File "ubuntu_sso\account.pyc", line 216, in login
WebClientError: (u'SSL handshake failed', u'')
2012-07-03 10:25:55,474:474.999904633 - ubuntu_sso.utils.ipc - INFO - Emitting remote signal for LoginError with callback <function on_login_error at 0x03925930>.

* sso-client-gui.log:
2012-07-03 10:25:55,476:476.000070572 - ubuntu_sso.current_user_sign_in_page - ERROR - Got error when login Ubuntu One, error: {'errtype': 'AuthenticationError', 'message': 'The authentication failed.'}
2012-07-03 10:25:55,476:476.000070572 - ubuntu_sso.qt - INFO - build_general_error_message: returning 'The authentication failed.'.
2012-07-03 10:25:55,476:476.000070572 - ubuntu_sso.sso_wizard_page - ERROR - 'CurrentUserSignInPage': emitting 'show_error' with args ('The authentication failed.',) and kwargs {}

How I solved the issue for this computer: I uninstalled the client and re-installed it and now it works (no Windows reboot in between, I just run uninstall, killed ubuntu* processes then run installer again and then the wizard was able to log in). Perhaps it helped that I tried accessing the service with web "client" after desktop client failed (like suggested here: https://one.ubuntu.com/help/faq/why-am-i-getting-an-the-authentication-failed-error-on-windows/), but I can't see how opening a page in Internet Explorer would somehow "activate" certificate for a 3rd party application. I didn't import any additional certificates and Ubuntu One site seems to be using GoDaddy certificate, supported out-of-the-box by Windows & all browsers.