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

[SaddleTramp]

Binary package hint: packagekit

Ubuntu jaunty (development branch) 9.04:

Upgraded to Jaunty from Intrepid 8.10. After successful system reboot, Crash Report indicated this error.

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/packagekit/aptDBUSBackend.py
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: packagekit-backend-apt 0.3.14-0ubuntu4
ProcAttrCurrent: unconfined
ProcCmdline: python /usr/lib/packagekit/aptDBUSBackend.py
ProcEnviron:

PythonArgs: ['/usr/lib/packagekit/aptDBUSBackend.py']
SourcePackage: packagekit
Title: aptDBUSBackend.py crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/packagekit/aptDBUSBackend.py", line 48, in <module>
     import gobject
 ImportError: No module named gobject
Uname: Linux 2.6.28-9-generic x86_64
UserGroups: