ubuntuone-launch crashed with DBusException in __new__(): org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-fg5pGHRG8Y: Connection refused

[Nicolas DERIVE]

Binary package hint: ubuntuone-client

After an X server restart (following a crash of it) I got this error, under latest Natty.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: ubuntuone-client 1.5.3-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
Architecture: i386
CheckboxSubmission: 52c8d1e1dc4f870adb17edbee465da09
CheckboxSystem: 0886efe3e95f2342b20ae33cd4eb5c2a
Date: Fri Feb 4 14:44:56 2011
ExecutablePath: /usr/bin/ubuntuone-launch
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/ubuntuone-launch
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 LANG=fr_FR.UTF-8
 LC_MESSAGES=fr_FR.utf8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/ubuntuone-launch']
SourcePackage: ubuntuone-client
Title: ubuntuone-launch crashed with DBusException in __new__(): org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-fg5pGHRG8Y: Connection refused
UbuntuOneClientConfig:
 [ubuntuone]
 connected = True
 connect = 0
 show_applet = 0
 bookmarked = True
UbuntuOneSyncdaemonExceptionsLog:

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 #618189, 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.