> Sorry forgot to mention I'm running AMD64 Stable and therefor KDE-4.4.5.

As Duncan already said earlier in this thread, KDE 4.6 was the first
version that could do auto-mounting without HAL. Both 4.4.x and 4.5.x
need HAL for auto-mounting.

So, if you want auto-mounting, you have two options:
(1) update KDE to 4.6.x (IMHO it's better overall than 4.4.x ever was, YMMV)
(2) re-install HAL for the time being (it doesn't hurt, does it?).

> Of course I do not _need_ the knotify-popup to mount something I can do it on
> the command line as well but I find it is nice to have and the users of "the
> other OS" asks me why I have do such things manually in Linux.

Well, you don't have to, if you have the right packages installed :-)