So, I've installed KDE in Arch Linux using the kde package, as well as phonon-xine from pacman. Maybe it's because I had GNOME before, maybe it's because I did something wrong, but when I log in from KDM, all I get is a small white terminal in the bottom right corner.
Now, from this terminal, I can launch plasma-desktop, and from the actual launcher I can get a konsole session open, and then I can start KWin or compiz and KDE4-Window-Decorator and have a usable desktop environment.
I don't think this is expected behavior, though. How do I get it to launch all this stuff properly (and anything else I'm forgetting) when I log in from KDM?
Also, since I've installed KDE, GNOME is all messed up - but one thing at a time, and if I like KDE enough I'll uninstall GNOME anyway.