I get this traceback from Lucid alpha, last updated 2010-01-01:

bruce@Herodotus:~$ kcmshell4 system-config-printer-kde
kcmshell(3577)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from  "/var/tmp/kdecache-bruce/ksycoca4"
kcmshell(3577)/kutils (KCMultiDialog) KCMultiDialog::addModule: "Printer Configuration"
kcmshell(3577)/kutils (KCModuleProxy) KCModuleProxyPrivate::loadModule: Module not already loaded, loading module  "Printer Configuration"  from library  "kpythonpluginfactory"  using symbol  "kpythonpluginfactory"
kcmshell(3577)/python (plugin) KPythonPluginFactory::KPythonPluginFactory: KPythonPluginFactory::KPythonPluginFactory()
kcmshell(3577)/python (plugin) KPythonPluginFactory::initialize: Initializing Python interpreter.
kcmshell(3577)/python (plugin) KPythonPluginFactory::initialize: Succesfully initialized Python interpreter.
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: KPythonPluginFactory::create iface:  KCModule
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: keyword to be used for finding the plugin code:  "system-config-printer-kde/system-config-printer-kde.py"
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: Path to plugin code is:  "/usr/share/kde4/apps/system-config-printer-kde/system-config-printer-kde.py"
kcmshell(3577)/python (plugin): Error while running factory function for Python plugin:  "system-config-printer-kde/system-config-printer-kde.py"
Traceback (most recent call last):
  File "<string>", line 18, in kpythonpluginfactory_bridge
  File "/usr/share/kde4/apps/system-config-printer-kde/system-config-printer-kde.py", line 4004, in CreatePlugin
    kcm = u.makeui(component_data, widget_parent)
  File "/usr/share/kde4/apps/system-config-printer-kde/system-config-printer-kde.py", line 217, in makeui
    self.ui.btnJOResetCopies),
  File "/usr/share/kde4/apps/system-config-printer-kde/options.py", line 117, in __init__
    self.reinit (None)
  File "/usr/share/kde4/apps/system-config-printer-kde/options.py", line 155, in reinit
    self.set_widget_value (self.system_default)
  File "/usr/share/kde4/apps/system-config-printer-kde/options.py", line 178, in set_widget_value
    raise NotImplemented
TypeError: exceptions must be classes or instances, not NotImplementedType
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: KPythonPluginFactory::create iface:  KCModule
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: keyword to be used for finding the plugin code:  ""
kcmshell(3577)/python (plugin) KPythonPluginFactory::create: Path to plugin code is:  "/home/bruce/.kde/share/apps/"
kcmshell(3577)/python (plugin): Failed to import module
kcmshell(3577)/kcontrol KCModuleLoader::loadModule: This module has no valid entry symbol at all. The reason could be that it's still using K_EXPORT_COMPONENT_FACTORY with a custom X-KDE-FactoryName which is not supported anymore
kcmshell(3577)/kutils (KCMultiDialog) KCMultiDialog::addModule: adding KCM  "Printer Configuration"  at the top level
kcmshell(3577)/kutils (KCMultiDialog) KCMultiDialogPrivate::_k_slotCurrentPageChanged:
kcmshell(3577)/kutils (KCMultiDialog) KCMultiDialogPrivate::_k_dialogClosed:
kcmshell(3577)/python (plugin) KPythonPluginFactory::~KPythonPluginFactory: KPythonPluginFactory::~KPythonPluginFactory()
bruce@Herodotus:~$