Latest is: 0.4.1 release Older, but still supported upgrades: 0.4 release
Release notes January 3rd 2017 edit: I had written echi=off to the 0.4 original release notes, which is wrong. It should be edd=off. Edd stands for Enhanced disk drive. Apologies for the mistake. Use edd=off in the case that the boot to live-environment hangs and does not continue. Now, the entry should also be correct within the original release notes.