Comment 13 for bug 632708

If you are still getting AUTH_FAILED, with all the latest updates installed, you may need to delete your Ubuntu One Token from Seahorse an re-add your computer with the newer client. I have included those steps below.

   1. Quit the Ubuntu One Preferences (if open)
   2. Open Applications->Accessories->Passwords and Encryption Keys
   3. Click on the arrow next to "Passwords"
   4. Right-click on the Ubuntu One token and select "Delete"
   5. Go to https://one.ubuntu.com/account/machines/
   6. Click on the checkbox next to your computer
   7. Click the "Remove selected computers" button
   8. Open System -->Preferences-->Ubuntu One or Me Menu --> Ubuntu One
   9. a web page should open, prompting you to add your computer to your Ubuntu One account
  10. Add your computer

thank you,
duanedesign