AFAIK the 5.2 release, like this one, was a c't magazine and CeBIT special. It's been a while since we had a public release - 5.1.1 came out in January, 2007.

Anyway, here are some screenshots of Knoppix 5.3. (Click the thumnails for a larger view, and watch out for the ad server cookies ImageShack likes to set.)



KDE 3 desktop



KDE 3 with compiz-fusion



KDE 4.0.1 desktop (note the "Kubuntu" logo)



GNOME and Xfce 4 desktops