applet.py crashed with KeyError in refresh()

[ALaunchpadUser]

Binary package hint: system-config-printer

It happened at:

# sudo aptitude update; sudo apt-get -y --print-uris upgrade | egrep -o -e "http://[^\']+" | sudo aria2c -c -d /var/cache/apt/archives -i -; sudo aptitude -y safe-upgrade

Description: Ubuntu lucid (development branch)
Release: 10.04

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: system-config-printer-gnome 1.2.0+20100408-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-21.31-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
Architecture: i386
CupsErrorLog:

Date: Sat Apr 17 08:55:19 2010
ExecutablePath: /usr/share/system-config-printer/applet.py
InterpreterPath: /usr/bin/python2.6
Lpstat:
 device for epson: socket://192.168.2.250:9100
 device for hp-laserjet2300n: hp:/net/hp_LaserJet_2300_series?ip=192.168.2.240
MachineType: ASUSTeK Computer INC. 1000H
PackageArchitecture: all
Papersize: a4
PpdFiles:
 epson: EPSON AL-CX21 v3017.102
 hp-laserjet2300n: HP LaserJet 2300 Postscript (recommended)
ProcCmdLine: root=UUID=cad6d638-9a96-497e-817e-61dc04e015b5 ro quiet splash
ProcCmdline: python /usr/share/system-config-printer/applet.py
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/system-config-printer/applet.py']
SourcePackage: system-config-printer
Title: applet.py crashed with KeyError in refresh()
UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare x2gousers
dmi.bios.date: 03/03/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1803
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1000H
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1803:bd03/03/2009:svnASUSTeKComputerINC.:pn1000H:pvrx.x:rvnASUSTeKComputerINC.:rn1000H:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 1000H
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.

[ALaunchpadUser (wegs-petra+ubuntuone)]

Thank you so much for your work guys! Wish I could help more..