ubuntuone-syncdaemon crashes after startup

[Barry Drake]

This bug was reported some weeks ago and was fixed. Today, I had to re-install Raring after a disaster, and the bug has re-appeared. The terminal shows this:
~$ ubuntuone-control-panel-qt
QGtkStyle was unable to detect the current GTK+ theme.
Unhandled error in Deferred:
Unhandled Error
Traceback (most recent call last):
Failure: ubuntuone.platform.tools.linux.IPCError: org.freedesktop.DBus.Error.Spawn.ChildExited:
Unhandled error in Deferred:
Unhandled Error
Traceback (most recent call last):
Failure: ubuntuone.platform.tools.linux.IPCError: org.freedesktop.DBus.Error.Spawn.ChildExited:
Unhandled error in Deferred:
Unhandled Error
Traceback (most recent call last):
Failure: ubuntuone.platform.tools.linux.IPCError: org.freedesktop.DBus.Error.Spawn.ChildExited:
Unhandled error in Deferred:
Unhandled Error
Traceback (most recent call last):
Failure: ubuntuone.platform.tools.linux.IPCError: org.freedesktop.DBus.Error.Spawn.ChildExited:

u1sdtool (which worked with the previous bug) now shows this :
~$ u1sdtool --list-folders
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:651: PyGIDeprecationWarning: Calling io_add_watch without priority as second argument is deprecated
  PyGIDeprecationWarning)
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:662: PyGIDeprecationWarning: Calling io_add_watch with priority keyword argument is deprecated, put it as second positional argument
  PyGIDeprecationWarning)
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:677: PyGIDeprecationWarning: Calling io_add_watch with a file descriptor is deprecated; call it with a GLib.IOChannel object
  PyGIDeprecationWarning)

Oops, an error ocurred:
org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/lib/ubuntuone-client/ubuntuone-syncdaemon exited with status 1

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntuone-control-panel-qt 4.1.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
Uname: Linux 3.7.0-7-generic i686
ApportVersion: 2.7-0ubuntu2
Architecture: i386
Date: Mon Dec 17 16:33:33 2012
InstallationDate: Installed on 2012-12-17 (0 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20121217)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntuone-control-panel
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.