The fourth major release of DragonFly, on July 25, 2006. The biggest user-visible changes in this release were a new random number generator, a massive reorganization of the 802.11 (wireless) framework, and extensive bug fixes in the kernel. It also made significant progress in pushing the big giant lock inward and made extensive modifications to the kernel infrastructure with an eye towards DragonFly's main clustering and userland VFS goals. DragonFly's team considered 1.6 to be more stable than 1.4.