ubuntuone-launch crashed with DBusException in __new__(): org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-jBVlrYo1bi: Connection refused

Binary package hint: ubuntuone-client

Sorry for my bad English!
After you upgrade from ubuntu 10.10 to ubuntu 11.04, ubuntuone-client just crashed.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: ubuntuone-client 1.5.8-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
NonfreeKernelModules: nvidia wl
Architecture: i386
Date: Fri Apr 1 16:54:34 2011
ExecutablePath: /usr/bin/ubuntuone-launch
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/bin/ubuntuone-launch
ProcEnviron:
 LANGUAGE=en
 LANG=en_US.utf8
 LC_MESSAGES=en_GB.UTF-8
 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-jBVlrYo1bi: Connection refused
UbuntuOnePreferencesLog:
 2011-02-10 11:40:27,651 - ubuntuone-preferences - INFO - Starting Ubuntu One Preferences
 2011-02-10 11:41:48,899 - ubuntuone-preferences - INFO - Got credentials for Ubuntu One
 2011-02-10 11:42:08,435 - ubuntuone-preferences - INFO - Got credentials for Ubuntu One
 2011-02-10 11:43:49,602 - ubuntuone-preferences - INFO - Starting Ubuntu One Preferences
 2011-02-10 11:43:51,432 - ubuntuone-preferences - INFO - Got credentials for Ubuntu One
UbuntuOneSyncdaemonExceptionsLog:

UbuntuOneSyncdaemonInvalidNamesLog:
 2011-03-06 15:47:12,010 - ubuntuone.SyncDaemon.InvalidNames - INFO - IN_CREATE in u'/home/netforce/Documents': path '\x93\xaf\xe0\xa0\xa6\xad\xa5\xad\xa8\xef.pdf'
 2011-03-06 15:47:12,011 - ubuntuone.SyncDaemon.InvalidNames - INFO - IN_OPEN in u'/home/netforce/Documents': path '\x93\xaf\xe0\xa0\xa6\xad\xa5\xad\xa8\xef.pdf'
 2011-03-06 15:47:12,029 - ubuntuone.SyncDaemon.InvalidNames - INFO - IN_CLOSE_WRITE in u'/home/netforce/Documents': path '\x93\xaf\xe0\xa0\xa6\xad\xa5\xad\xa8\xef.pdf'
 2011-03-06 15:50:31,059 - ubuntuone.SyncDaemon.InvalidNames - INFO - IN_DELETE in u'/home/netforce/Documents': path '\x93\xaf\xe0\xa0\xa6\xad\xa5\xad\xa8\xef.pdf'
UbuntuOneUserSyncdaemonConfig:
 [bandwidth_throttling]
 on = False
 read_limit = 2097152
 write_limit = 2097152
UpgradeStatus: Upgraded to natty on 2011-04-01 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare