Thanks Wackojacko, yes of course I tried that but did not solve the "@" nor the Ctrl+C. besides the Konsole cann't detect the äüöß stuff.
As it seems only to affect Konsole and happened after upgrading to xorg I would suspect a problem in xorg.conf. Have you tried dpkg-reconfigure xserver-xorg to check the correct keyboard layout and type?
If so it might help if you post your xorg.conf so others more knowledgeable than I could take a look.
HTHWackojacko