Comment 2 for bug 640563

arnodf,
thank you for submitting this bug report. Looking at your logs it appears you are affected by bug 479271. This bug has been fixed in newer versions of Ubuntu One. If this bug is persistent you might want to update to the Ubuntu One Beta PPA. You can find that PPA here:

https://launchpad.net/~ubuntuone/+archive/beta?field.series_filter=karmic

If you are running Karmic or newer you can add the PPA by opening a Terminal and running:

sudo add-apt-repository ppa lp: ppa:ubuntuone/beta

then to update run the command:

sudo apt-get update; sudo apt-get upgrade

thank you,
duanedesign