Comment # 14 on bug 902407 from Rahim Barbamas

OK, I got it now. (I switched all installed packages to your repo.) It is
definitely better than before. The KDE PackageKit helper window still appears,
but the good part is that after dismissing it, system-config-printer stops
searching for drivers and lets me select it manually.

Here's the KDE helper error:
---------------------------
ERROR:dbus.proxies:Introspect error on :1.68:/org/freedesktop/PackageKit:
dbus.exceptions.IntrospectionParserException: Error parsing introspect data:
<class 'xml.parsers.expat.ExpatError'>: unbound prefix: line 5, column 4
HTTP Status 403
None