Last post reported Knoppix 6.1 DVD created did not boot.
I have also mentioned problem encountered while burning the DVD.
Finally a copy went through and the same copy was used for booting but failed the boot.

Not convinced Knoppix is the culprit, I bought myself a brand new DVD writer.
Burnt 2 copies of Knoppix 6.1 DVD from same iso file with two (2) different DVD media.
Guess what - both copies were able to boot a laptop and a desktop.

This implies problem should be caused by (skewed) DVD head alignment, that is, DVD produced on one burner may not be able to read by other DVD reader/writer.

So, my case is closed - javascript:emoticon('')

Regards,
Julian