software-center crashed with UnicodeDecodeError in HardwareRequirementsLabel(): 'ascii' codec can't decode byte 0xe2 in position 0: ordinal not in range(128)

Sofware Centre crashes pretty much as soon as I open it.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: software-center 5.3.11
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic i686
ApportVersion: 2.5.1-0ubuntu7
Architecture: i386
CrashCounter: 1
Date: Fri Sep 7 21:41:20 2012
ExecutablePath: /usr/share/software-center/software-center
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-center
ProcEnviron:
 LANGUAGE=fr:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/software-center']
SourcePackage: software-center
Title: software-center crashed with UnicodeDecodeError in HardwareRequirementsLabel(): 'ascii' codec can't decode byte 0xe2 in position 0: ordinal not in range(128)
UpgradeStatus: Upgraded to quantal on 2012-09-06 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare