I tried to insert a PPA but an error appeared. I tried later but all worked fine.
ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: python-software-properties 0.81.9
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Date: Wed Sep 28 10:16:56 2011
ExecutablePath: /usr/bin/add-apt-repository
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/add-apt-repository ppa:webkit-team/ppa
PythonArgs: ['/usr/bin/add-apt-repository', 'ppa:webkit-team/ppa']
SourcePackage: software-properties
Title: add-apt-repository crashed with ValueError in raw_decode(): No JSON object could be decoded
UpgradeStatus: Upgraded to oneiric on 2011-09-26 (1 days ago)
UserGroups:
Can you still reproduce this? Based on the description and the traceback it should've been caused by some temporary server issue. That could be treated better indeed, but there's no easy way to test it.