system-config-printer.py crashed with TypeError in get_hplip_uri_for_network_printer(): coercing to Unicode: need string or buffer, list found

[Iestyn Guest]

Clicked on Start button (Upper right corner) -> Printers. Then click the Add button. The 'Select Device' window comes up and automatically finds my network printer (Brother HL-4040CDN) as a device in the left window pane. The 'Forward' button stays grayed-out. I select my printer (double clicked) and then system-config-printer.py crashes.
Note: this is an alpha nightly build of Ubuntu Precise 12.04 development branch.

pkg: system-config-printer-gnome or system-config-printer-common?

Kind regards,

Iestyn Guest

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: system-config-printer-gnome 1.3.8+20120130-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-12.20-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CrashCounter: 1
CupsErrorLog:

CurrentDmesg: [ 184.215176] type=1400 audit(1328053606.090:27): apparmor="DENIED" operation="open" parent=1 profile="/usr/lib/telepathy/mission-control-5" name="/usr/share/gvfs/remote-volume-monitors/" pid=2031 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Date: Tue Jan 31 18:48:36 2012
DuplicateOf: https://bugs.launchpad.net/bugs/924553
ExecutablePath: /usr/share/system-config-printer/system-config-printer.py
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120131.2)
InterpreterPath: /usr/bin/python2.7
Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added.
MachineType: System manufacturer System Product Name
PackageArchitecture: all
Papersize: letter
ProcCmdline: /usr/bin/python /usr/share/system-config-printer/system-config-printer.py
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-12-generic root=UUID=673cda4d-3752-4404-b569-c22212712d0c 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 TypeError in get_hplip_uri_for_network_printer(): coercing to Unicode: need string or buffer, list found
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 06/05/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS P5N-D ACPI BIOS Revision 0601
dmi.board.name: P5N-D
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSP5N-DACPIBIOSRevision0601:bd06/05/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5N-D:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #924553, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.