Recently I installed emesene 1.5.1 on my Kubuntu jaunty, when I installed the deb package it asked me to install "python-support (>= 0.90.0)" package, so I did. This made my new emesene to work, but some python application in KDE stop working correctly, for example the printer configuration. When I open it this message appears.

The service "printer configuration" provides no interface "KCModule" with the keyword "system-config-printer-kde/system-config-printer-kde.py"

Also I tried to upgrade to the new kubuntu version by using the command
sudo update-notifier-kde -u

This throws the following message

Traceback (most recent call last):
File "/usr/bin/update-notifier-kde", line 34, in <module>
import dbus.mainloop.qt
ImportError: No module named qt

This issue started when I installed that python support package. I've been reading and this things are somehow related to python 2.6, and the solutions that worked for most people don't work for me. These are reinstalling python-qt4-dbus and installin python-dev packages.
Does someone knows what can be happening?