It now works, so I'm marking it as invalid.
I will report another bug if this happens again.
** Changed in: ubuntuone-client (Ubuntu)
Status: New => Invalid
--
After recent update UbuntuOne client fails to authenticate
https://bugs.launchpad.net/bugs/434147
You received this bug notificat
** Attachment added: ".home.igor..cache.ubuntuone.log.oauth.login.log.txt"
http://launchpadlibrarian.net/32173734/.home.igor..cache.ubuntuone.log.oauth.login.log.txt
** Attachment added:
".home.igor..cache.ubuntuone.log.syncdaemon.exceptions.log.txt"
http://launchpadlibrarian.net/3217373