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

[Steve Garton]

Trying to start calibre, and it crashes immediately with the following traceback:

sheepeatingtaz@corellia:~$ calibre
Traceback (most recent call last):
  File "/usr/bin/calibre", line 19, in <module>
    sys.exit(main())
  File "/usr/lib/calibre/calibre/gui2/main.py", line 372, in main
    app, opts, args, actions = init_qt(args)
  File "/usr/lib/calibre/calibre/gui2/main.py", line 51, in init_qt
    from calibre.gui2.ui import Main
  File "/usr/lib/calibre/calibre/gui2/ui.py", line 31, in <module>
    from calibre.gui2.widgets import ProgressIndicator
  File "/usr/lib/calibre/calibre/gui2/widgets.py", line 23, in <module>
    from calibre.gui2.progress_indicator import ProgressIndicator as _ProgressIndicator
  File "/usr/lib/calibre/calibre/gui2/progress_indicator/__init__.py", line 15, in <module>
    pi_error)
RuntimeError: Failed to load the Progress Indicator plugin: the PyQt4.QtCore module is version 1 but the progress_indicator module requires version -1

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: calibre 0.8.8+dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Tue Oct 4 06:30:49 2011
ExecutablePath: /usr/bin/calibre
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python2.7 /usr/bin/calibre
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
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: Upgraded to oneiric on 2011-09-25 (8 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[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 #864252, 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.