software-properties-gtk crashed with UnicodeDecodeError in init_distro(): 'ascii' codec can't decode byte 0xc3 in position 13: ordinal not in range(128)

Can not start software-properties

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: software-properties-gtk 0.81.4
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic 3.0.0
Uname: Linux 3.0.0-7-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Sun Jul 31 16:39:37 2011
ExecutablePath: /usr/bin/software-properties-gtk
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110731)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk
ProcEnviron:
 LANG=sv_SE.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/software-properties-gtk']
SourcePackage: software-properties
Title: software-properties-gtk crashed with UnicodeDecodeError in init_distro(): 'ascii' codec can't decode byte 0xc3 in position 13: ordinal not in range(128)
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare