Oh, damn.... Just read your message again... Should've payed more attention.
I just checked.. It seems that in kde-unstable kdemultimedia is a package group and in extra it is a real package. Well, I don't know how pacman handles that, but I believe groups do not satisfy dependencies. Maybe you could install mpg123 and normalize as dependencies and them k3b without cheking for dependencies: pacman --asdeps -S mpg123 normalize pacman -Sd k3b -- Malformed message exception
