Comment 61 for bug 905147

I have been experiencing this issue since I switched to KDE4. I thought I was just stupid and did not know how to save the settings once for all. I find it
extremely annoying. This definitely gets the maximum votes I can give it.

In my humble opinion:
-default should be duplex if the printer driver supports it (trees matter)
-whatever the default is, the user should be able to save her/his own preference, instead of having to set them again at every single print