For example, it has been found that the anisotropic setting was not working correctly in P12 Superfly, something that was corrected in the latest builds. I also believe that the specular node was not working as it should since P11 for Superfly, another feature that was actually broken for a long time and recently corrected. HDR background projection was broken in one of the builds, I was one of the first to report the problem. A good number of these problems have been posted in the forum and subsequently reported to the techs.