applet.py crashed with ImportError in <module>()

Binary package hint: system-config-printer

Random crash on startup.

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: system-config-printer-gnome 1.2.0+20100408-0ubuntu5.2
ProcVersionSignature: Ubuntu 2.6.35-7.12-generic 2.6.35-rc4
Uname: Linux 2.6.35-7-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CupsErrorLog:

Date: Sat Jul 10 11:15:34 2010
EcryptfsInUse: Yes
ExecutablePath: /usr/share/system-config-printer/applet.py
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
InterpreterPath: /usr/bin/python2.6
Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added.
MachineType: Hewlett-Packard Compaq Presario CQ50 Notebook PC
PackageArchitecture: all
Papersize: a4
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-7-generic root=UUID=804d80b5-13a3-4245-835d-70b60a2e88d2 ro crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcCmdline: python /usr/share/system-config-printer/applet.py
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/system-config-printer/applet.py']
SourcePackage: system-config-printer
Title: applet.py crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.6/gtk-2.0/gi/__init__.py", line 27, in <module>
     from gi.repository import GObject
 ImportError: cannot import name GObject
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 06/23/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.3E
dmi.board.name: 360A
dmi.board.vendor: Wistron
dmi.board.version: 08.60
dmi.chassis.type: 10
dmi.chassis.vendor: Wistron
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.3E:bd06/23/2009:svnHewlett-Packard:pnCompaqPresarioCQ50NotebookPC:pvrF.3E:rvnWistron:rn360A:rvr08.60:cvnWistron:ct10:cvrN/A:
dmi.product.name: Compaq Presario CQ50 Notebook PC
dmi.product.version: F.3E
dmi.sys.vendor: Hewlett-Packard