update-notifier-kde.py crashed with ImportError in <module>()

[aguy]

Binary package hint: update-notifier-kde

no idea why this occured

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/share/python-support/update-notifier-kde/update-notifier-kde.py
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: update-notifier-kde 0.16
PackageArchitecture: all
ProcCmdline: python /usr/bin/update-notifier-kde
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/update-notifier-kde']
SourcePackage: update-notifier-kde
Title: update-notifier-kde.py crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/update-notifier-kde", line 34, in <module>
     import dbus.mainloop.qt
 ImportError: No module named qt
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video