Oh well. I just deleted all the Ubuntu One tokens (which were all for my other machine) and restarted the U1 prefs. This time it gave me a Connect option! Very briefly it said it was synchronizing, and then it went back to Disconnected without the option to connect.
I'll attach logs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/696361 Title: Ubuntu sso fails with 'An HTTP non-2xx response code was received' -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs