"We’re back again with this new RC4 version. Since the last RC3 release, we received many patches and fixes, and also backported some important features like ATI graphics device injection, EFI64 tables and PCI root configuration. Also added a new boot option for hiding unwanted foreign partitions from the boot menu."
Read more:
http://chameleon.osx86.hu/articles/chameleon-20-rc4-is-out