Backup Problem In Ubuntu 14.04
Solution 1:
It's a bug in Ubuntu backup (deja-dup). https://bugs.launchpad.net/ubuntu/+source/deja-dup/+bug/1313034
You can adjust the rights of the folders. Open a terminal and copy these commands:
sudo chown "$USER:$USER" ~/.cache/dconf ~/.gvfs
sudo chown -R "$USER:$USER" ~/.dbus