add new 3rd party software source craches on start : software-properties-gtk crashed with UnicodeDecodeError in __init__(): 'ascii' codec can't decode byte 0xe2 in position 2: ordinal not in range(128)

[David.Xiong]

When click "add..." on the "other software" tab page, it crashes
using Ubuntu 11.04

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: software-properties-gtk 0.80.2
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic i686
Architecture: i386
Date: Sun May 8 06:26:19 2011
ExecutablePath: /usr/bin/software-properties-gtk
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk -n -t 41943178
ProcEnviron:
 LANGUAGE=zh_CN:en
 PATH=(custom, no user)
 LANG=zh_CN.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/software-properties-gtk', '-n', '-t', '41943178']
SourcePackage: software-properties
Title: software-properties-gtk crashed with UnicodeDecodeError in __init__(): 'ascii' codec can't decode byte 0xe2 in position 2: ordinal not in range(128)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #721778, 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.