Quote Originally Posted by stefan741
Thx 'usbrit'. but it changed nothing

But I tried also what Stephen advised me.
Problem now, when i try to 'apt-get -s install libvorbis0' - apt-get is about to uninstall the whole KDesktop

Why the f... is that?
You are trying to install the wrong package libvorbis0 is in stable:
Code:
HappyTux:/home/stephen# apt-cache policy libvorbis0
libvorbis0:
  Installed: (none)
  Candidate: 1.0rc3-1
  Version Table:
     1.0rc3-1 0
        500 http://ftp.de.debian.org stable/main Packages
        100 /var/lib/dpkg/status
So apt is trying to downgrade your install can you post the entire output of the apt-get -s install mplayer-??? replace the ??? with which every version you are trying to install so that I can see what it is trying to do. When you get warnings like you are getting it is best to use the apt-cache policy on the package every time it happens to see where apt is trying to get the package from and obvisiously you do not want to try to install packages from stable it will downgrade your install every time.