Comment 6 for bug 487123

I'm not behind a proxy.

I could fix this by following an advice I read somewhere. I purged ubuntune-client and ubuntuone-client-gnome and deleted all ubuntuone files and folders I found in my home directory (this included hidden files and folders and ~/Ubuntu One), reboot and installed ubuntuone-client-gnome again --I tried before just deleting files and folders but it didn't work.

After that, the first time I opened ubuntuone my browser showed something like "An error has occurred in Lainchpad, we'll try to fix it" (sorry I didn't make a copy of the message).

Then I closed ubuntuone and opened it for a second time and the browser showed my name and an invitation to sign in. But after pressing the sign in button the error message appeared again.

The third time, after pressing the sign in button the "Add this computer to Ubuntu One" page appeared and this time I could do it whithout trouble.

I didn't tested the service yet but at least I could add my computer and I can connect and disconnect so this is fixed for me and I hope this can help others, buy I can't figure out what went wrong.