calibre-parallel crashed with IndexError in build_index()

Binary package hint: calibre

while downloading rss feeds, I think nrcnext (dutch NL)

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: calibre 0.6.42+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
Uname: Linux 2.6.31-20-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sun Aug 29 08:57:13 2010
ExecutablePath: /usr/bin/calibre-parallel
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: python /usr/bin/calibre-parallel
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
 LANGUAGE=nl_NL:nl
PythonArgs: ['/usr/bin/calibre-parallel']
SourcePackage: calibre
Title: calibre-parallel crashed with IndexError in build_index()
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