Version: (using KDE 4.3.1) OS: Linux Installed from: Fedora RPMs I'm on Fedora Rawhide x86_64, kde 4.3.1, qt 4.5.2. Konqueror/okular/kate/kwrite don't display the correct setting in the print dialogue options/options tab for Duplex printing. My queue is set though cups to a duplex printer, but None is checked by default in the the options/options tab. However, the jobs do print double sided (except from okular, see kde BZ#209620). I expected to see the Duplex printing option "Long side" checked in the options/options tab. The properties/advanced tab shows 2-sided printing set to Long-Edge Binding as expected.
It would be useful to know if anyone else sees this problem at all. If not I'll assume its a quirk of my system configuration and start looking to see what caused it myself.
I don't experience the same problem, but you might want to have a look at bug 180051: There seem to be quite some inconsistencies in the way KDE4 handles the printing settings.
Most probably http://bugreports.qt.nokia.com/browse/QTBUG-6433 or http://bugreports.qt.nokia.com/browse/QTBUG-6471