ksplash-engine-moodin depends on kde-base/ksplashml which blocks kde-base/kdebase. If you have kdebase installed you got ksplashml automatically. It should not depend on ksplashml, if kdebase is installed.
This bug is fixed already, and can be closed.
I'm closing the bug as jokey solved this on 12 Feb 2007. Ben, thanks for calling our attention.