This means that Amarok is using plug-ins via the KDE plug-in infrastructure. Unfortunately the KDE plug-in infrastructure uses a cache that is not aware of the plugins that are inside your cmg file. Hence, Amarok thinks they are missing.

We are aware of this general issue. Currently, KDE applications that rely on plug-ins do not work correctly with klik. It might be possible, however, to hand-tweak the wrapper file for amarok.