ubuntuone-client-preferences crashed with IOError in save_config()

[Dave]

Binary package hint: ubuntuone-client

Just upgraded to the beta.
System -> Preferences -> Ubuntu One
After a few seconds the 'Report Bug' dialog pops up.

(1)
$ lsb_release -rd
Description: Ubuntu karmic (development branch)
Release: 9.10

(2)
$ apt-cache policy ubuntuone-client
ubuntuone-client:
  Installed: 0.96.0-0ubuntu1
  Candidate: 0.96.0-0ubuntu1
  Version table:
 *** 0.96.0-0ubuntu1 0
        500 http://us.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

(3) Expected some sort of front end to Ubuntu One to start up
(4) Instead got the 'report a bug' dialog box

ProblemType: Crash
Architecture: amd64
Date: Sat Oct 3 09:20:07 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/ubuntuone-client-preferences
InterpreterPath: /usr/bin/python2.6
Package: ubuntuone-client-gnome 0.96.0-0ubuntu1
ProcCmdline: /usr/bin/python /usr/bin/ubuntuone-client-preferences
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
PythonArgs: ['/usr/bin/ubuntuone-client-preferences']
SourcePackage: ubuntuone-client
Title: ubuntuone-client-preferences crashed with IOError in save_config()
Uname: Linux 2.6.31-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #441039, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.