tomboy notes cannot sync with ubuntu one xbuntu

Tomboy cannot connect and sync to unbuntu one when using a xbuntu session.

When setting sync preferences in
edit -> preferences -> synchronisation

and service to
Tomboy Web

Clicking the button, connect to server, does not work. Tomboy preferences hangs and a browser is not started.

If tomboy notes is set up using a normal ubuntu session synchronization works.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: tomboy 1.8.0-1ubuntu1.1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Fri Nov 4 12:33:18 2011
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: tomboy
UpgradeStatus: No upgrade log present (probably fresh install)