Ubuntu One worked perfectly for me before the update. After i switched to Ubuntu 12.04 Precise (Beta 2), It crashed with an error message:
CredentialsError DBusException(dbus.String(u'Traceback (most recent call last):\n File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 707, in _message_cb\n retval = candidate_method(self, *args, **keywords)\n File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/platform/credentials/linux.py", line 185, in find_credentials\n reply_handler=reply_handler, error_handler=error_handler)\n File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 137, in __call__\n **keywords)\n File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 584, in call_async\n message.append(signature=signature, *args)\nValueError: Unable to guess signature from an empty dict\n'),)
I even checked the bug report for bug #711162 at https://bugs.launchpad.net/ubuntu/+source/ubuntuone-client/+bug/711162
I waited for the beta to get over, but even after that, it still doesn't work!
I need some help, because i use Ubuntu One for a lot of my work, and i need it back ASAP!
And another weird thing is that this happened only AFTER UPDATING! Before that, it was perfect!