I used 'knoppix-installer' to install Knoppix 4.0 from the DVD to my harddisk, as a Debian type of system. When I booted Knoppix from HD, I noticed that the installation is incomplete . Among others, many man pages, OpenOffice.org and Eclipse were missing. I happened to discover the missing stuff in directory /KNOPPIX2 on the DVD. So, after rebooting from DVD, I copied the contents of that directory (namely folders /usr and /opt) to my HD. Now everything seems to work fine (I haven't tried all options yet).

Kanotix or Fabian, could you eventually fix this?

Greetings and thanx for your work!