Hi, For users of Mac OS X Tiger, ghc-6.4 can now be built from source using the darwinports infrastructure. Special thanks to Wolfgang Thaller, for sharing some love with the mangler, making it just a little bit less evil. The build uses gcc-3.3. Using gcc-4.0 still produces some errors. Users updating from Panther should be sure they have installed the new Xcode tools that come with Tiger. Building on Tiger using the Panther toolchain will lead to frustration and misery. More information on darwinports (which just released version 1.0!) is available from http://darwinports.opendarwin.org Best Wishes, Greg