Knoppix 3.7 Released
twener writes "Version 3.7 of the bootable GNU/Linux Live CD Knoppix has been released and is available via Bittorrent or on the Knoppix Mirrors. Some of the new features are lots and lots of package updates including KDE 3.3.1, Kernel 2.4.27 + 2.6.9 (w/ ACPI), Java security update (1.4.2_06) and more supported graphics cards."
If you need to roll back the latest distro because of some bug, you can just pop the old CD back in the drive.
I use Knoppix on several of my main database servers.