Ok, I fixed the problem. It turned out that I had in fact python- qt4-common installed (which seems to only exist in jaunty), and it wasn't that I needed it, but that it somehow interfered with the karmic packages. So, after doing:
sudo apt-get remove python-qt4-common everything worked again: Python 2.6.2+ (release26-maint, Sep 9 2009, 22:58:56) [GCC 4.4.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> from PyQt4 import QtCore >>> dir(QtCore) ['PYQT_VERSION', 'PYQT_VERSION_STR', 'QAbstractEventDispatcher', 'QAbstractFileEngine', ' ...] >>> (btw. my first example was actually wrong it seems, but software- notifier-kde and software-properties-kde did exit with the error message mentioned in this bug report. ) -- software-properties-kde does not start, (QtCore Error) https://bugs.launchpad.net/bugs/407418 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs