system-config-printer.py crashed with IndexError in init(): list index out of range

Binary package hint: system-config-printer

I was configuring a Xerox Phaser 6121MFP.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: system-config-printer-gnome 1.3.1+20110222-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic x86_64
Architecture: amd64
CupsErrorLog:

Date: Tue Mar 15 09:53:26 2011
ExecutablePath: /usr/share/system-config-printer/system-config-printer.py
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110302)
InterpreterPath: /usr/bin/python2.7
Lpstat: device for SCX-4300-Series: usb://Samsung/SCX-4300%20Series
MachineType: Dell Inc. Latitude E6400
Papersize: a4
PpdFiles: SCX-4300-Series: Samsung SCX-4300, 2.0.0
ProcCmdline: /usr/bin/python /usr/share/system-config-printer/system-config-printer.py
ProcEnviron:
 LANGUAGE=it_IT:en
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-6-generic root=UUID=0aefd4ed-948a-4c20-9a92-f5f49b5fdc09 ro quiet splash vt.handoff=7
PythonArgs: ['/usr/share/system-config-printer/system-config-printer.py']
SourcePackage: system-config-printer
Title: system-config-printer.py crashed with IndexError in init(): list index out of range
UpgradeStatus: Upgraded to natty on 2011-03-10 (4 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 09/17/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A17
dmi.board.name: 0HT027
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA17:bd09/17/2009:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0HT027:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.