Comment 28 for bug 348704

Just to add to the discussion, I did an upgrade from 9.04 to 9.10/karmic alpha 1 and encountered this same problem.

Re-installing with "sudo apt-get install --reinstall python-qt4-dbus" does not resolve it.

The sym-link does exist:

# ls -l /var/lib/python-support/python2.6/dbus/mainloop/qt.so
lrwxrwxrwx 1 root root 47 2009-06-03 15:41 /var/lib/python-support/python2.6/dbus/mainloop/qt.so -> /usr/lib/pyshared/python2.6/dbus/mainloop/qt.so

# ls -l /usr/lib/pyshared/python2.6/dbus/mainloop/qt.so
-rw-r--r-- 1 root root 19152 2009-05-21 19:47 /usr/lib/pyshared/python2.6/dbus/mainloop/qt.so