Comment 4 for bug 607538

Can you try the following and let us know the results?

   1. Quit the Ubuntu One client
   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"

I have no password for Ubuntu On the ring you asked for.

   5. Go to https://one.ubuntu.com/account/machines/

I get this: You haven't added any computers or devices to your Ubuntu One account. To get started please visit the installation details. But I sure can post files and messages though :)

   6. Click on the checkbox next to your computer

No check box of course...

   7. Click the "Remove selected computers" button
   8. Open Applications->Internet->Ubuntu One
   9. a web page should open, prompting you to add your computer to your Ubuntu One account
  10. Add your computer

Steps 7-10 are a wash

You should be connected after you follow these steps. If you are not connected, can you please attach the following files to this bug report?

Sure. There is no ~/.cache/ubuntuone/log/syncdaemon-exceptions.log though

~/.cache/ubuntuone/log/oauth-login.log
~/.cache/ubuntuone/log/syncdaemon-exceptions.log
 ~/.cache/ubuntuone/log/syncdaemon.log