Comment 4 for bug 558878

I am sorry to hear that you are still unable to sync. From looking at your logs I see that the initial metadata error has now been resolved. Can you please also attach ~/.config/ubuntuone/syncdaemon.conf

I believe the "Failure: twisted.internet.error.ConnectionLost:" error you are experiencing *may* be related to bug 455544 which occurs when the bandwidth preferences are set too low (or to the defaults).