Everyone else was using gzip. On the latest downloads many of them are using bzip2, (I think everyone using scons) So I decided to update make release so that everyone is using gzip2. I don't mean to step on anyones toes, I know at least some of the platform maintainers do not use make though so feel free to change it back and or to something different for your platform. While I was at it I also changed default path of OPENEXR to /usr on linux. Was suggested on mailing list by Matt. (I'm pretty sure the linux maintainer is using scons) Kent