backend crashed with ValueError in loads()

[albertxiaoyu]

I have no idea, the system is just showing the software problem

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: checkbox 0.9
ProcVersionSignature: Ubuntu 2.6.28-11.42-generic
Uname: Linux 2.6.28-11-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Fri Apr 2 21:51:28 2010
ExecutablePath: /usr/share/checkbox/backend
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/checkbox/backend /tmp/checkboxBs9nsd/input /tmp/checkboxBs9nsd/output
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.utf8
 LANGUAGE=zh_CN:zh
PythonArgs: ['/usr/share/checkbox/backend', '/tmp/checkboxBs9nsd/input', '/tmp/checkboxBs9nsd/output']
SourcePackage: checkbox
Title: backend crashed with ValueError in loads()
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 #536645, 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.