jockey-backend crashed with TypeError in pulse_items(): an integer is required

[sebastienserre]

BUg comes at starting of session

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: jockey-common 0.9.4-0ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic i686
Architecture: i386
Date: Thu Sep 8 17:03:45 2011
ExecutablePath: /usr/share/jockey/jockey-backend
InterpreterPath: /usr/bin/python2.7
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
MachineType: innotek GmbH VirtualBox
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/jockey/jockey-backend --debug -l /var/log/jockey.log
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-10-generic root=UUID=6b3f2dd9-074e-4fd1-9490-7243c4248896 ro quiet splash vt.handoff=7
PythonArgs: ['/usr/share/jockey/jockey-backend', '--debug', '-l', '/var/log/jockey.log']
SourcePackage: jockey
Title: jockey-backend crashed with TypeError in pulse_items(): an integer is required
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/apt/progress/old.py", line 121, in pulse_items
     if self.currentCPS > 0:
 TypeError: an integer is required
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH

[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 #841366, 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.