"Preview release? KDE 4.0 didn't have anywhere near full feature or
functionality implementation yet, so an early alpha or an early technology
preview."
It was the initial release of the KDE4-technology. It wasn't really intended for
everyday-users. The devs were quite clear on that point.
"4.1 has /most/ functionality implemented, but not all (no proxy support in
a full release?? you ARE kidding, right?? "
I tested the Beta1, and there was settings for proxy in System Settings. Am I missing
something?
And if all the reports around the net are to be believed, 4.1 is A LOT more "complete" than
4.0 is. There's buttload of polish and lots of new features. 4.1 just might be the ideal point
to jump aboard the KDE4-train.