jockey-gtk crashed with DBusException in call_blocking()

the red "crash" indicator appeared some time (several seconds) after booting 9.10 Live (i386, from an USB stick). The restricted drivers icon is also shown, which is good.

ProblemType: Crash
Architecture: i386
Date: Fri Oct 30 21:07:32 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/jockey-gtk
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: System manufacturer System Product Name
Package: jockey-gtk 0.5.5-0ubuntu2
PackageArchitecture: all
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=de console-setup/layoutcode=ch
ProcCmdline: /usr/bin/python /usr/bin/jockey-gtk --check 60
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
PythonArgs: ['/usr/bin/jockey-gtk', '--check', '60']
SourcePackage: jockey
Title: jockey-gtk crashed with DBusException in call_blocking()
Uname: Linux 2.6.31-14-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (gnome-settings-daemon:4649): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:4649): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:4704): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:4730): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
dmi.bios.date: 01/30/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1002
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B-E
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1002:bd01/30/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer