Thanks for your report, this appears to be me a transient problem.
Please let us know if it happens again.
** Changed in: ubuntuone-client (Ubuntu)
Status: New => Invalid
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Ubuntu One crashes on login
https://bugs.launchpad.net/bugs/477853
You received this bug notification because you
** Attachment added: ".home.coelho..cache.ubuntuone.log.oauth.login.log.txt"
http://launchpadlibrarian.net/3513/.home.coelho..cache.ubuntuone.log.oauth.login.log.txt
** Attachment added:
".home.coelho..cache.ubuntuone.log.syncdaemon.exceptions.log.txt"
http://launchpadlibrarian.net/3