ubuntuone-syncdaemon crashed with DBusException in __new__(): org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-NAoTHr7nVF: Connection refused

Binary package hint: ubuntuone-client

I had just logged into my desktop.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: ubuntuone-client 1.5.6-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
NonfreeKernelModules: nvidia wl
Architecture: i386
Date: Wed Mar 16 11:45:34 2011
ExecutablePath: /usr/lib/ubuntuone-client/ubuntuone-syncdaemon
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/lib/ubuntuone-client/ubuntuone-syncdaemon
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
PythonArgs: ['/usr/lib/ubuntuone-client/ubuntuone-syncdaemon']
SourcePackage: ubuntuone-client
Title: ubuntuone-syncdaemon crashed with DBusException in __new__(): org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-NAoTHr7nVF: Connection refused
UbuntuOneSyncdaemonExceptionsLog:

UpgradeStatus: Upgraded to natty on 2010-12-27 (78 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare