If your system has a nvidia grahics proccessor , it is likely you will experience nvidia panics .
to get rid of this go to terminal and type

cd /Volumes/Leopard/System/Library/Extensions
rm -rf NV*
rm -rf Ge*

this will remove all nvidia and geforce kexts from the directory

ls -x
this will allow you to check whether the nvidia kexts are still present

mind you this is only after installation of leopard the procedure can be followed.
to get terminal boot from leopard dvd and choose terminal from disk utilities .