If I do a clean HD install then do an apt-get update and select some packages (e.g. mod-python)
It throws up the usual loads of package upgrades + some removal candidates: one of which is sysvinit which it says is vital & dont do it.
If I try to select a sysvinit replacement like rcconf there appears to be a circular dependency problem. On other occasions it tries to remove a vital package like mount-aes. There seems to be a clash in the packages requested after an update but Im not good enough with apt to figure it all out: the apt-get uses the default apt sources.list file that comes with knoppix.

I have a useable system but I cant upgrade it.

My question then is;
Is there known to be an issue here? do others have apt-get upgrade problems?

How can I reverse the package list after doing one of these apt-get updates? At the moment I have to reinstall knoppix which is a bit dumb.