calibre crashed with RuntimeError in /usr/lib/calibre/calibre/gui2/progress_indicator/__init__.py: Failed to load the Progress Indicator plugin: the PyQt4.QtCore module is version 1 but the progress_indicator module requires version -1

[Rainer Rohde]

Just installed Calibre and it crashes right away...

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: calibre 0.8.8+dfsg-1
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Tue Aug 16 05:07:31 2011
ExecutablePath: /usr/bin/calibre
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64+mac (20110815)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python2.7 /usr/bin/calibre
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/calibre']
SourcePackage: calibre
Title: calibre crashed with RuntimeError in /usr/lib/calibre/calibre/gui2/progress_indicator/__init__.py: Failed to load the Progress Indicator plugin: the PyQt4.QtCore module is version 1 but the progress_indicator module requires version -1
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare