Hello, I have recently successfully installed py25-pyx (with texlive), py25- zlib, and py25-tkinter on Intel Leopard with macports 1.6.0. There is an outstanding trac ticket regarding py25-zlib: http://trac.macports.org/projects/macports/ticket/13406 In the ticket, an initial build failure is solved by either retrying the 'port install' command for py25-zlib, or examining the error message, going into the indicated directory, executing the desired command (also from the error message), leaving that directory and retrying the 'port install' command. I would like to mention that today, I experienced that identical error with a different package, py25-tkinter. The solution was exactly the same, too. I thought it was curious enough to have the same kind of install error with two different python 2.5 packages that I'd mention it on the list, so that anyone else affected by this (perhaps with other packages) is aware of the simple workaround. Macports on Leopard is working great. Apple would be wise to promote this on their website, or throw some serious money behind it (if they haven't already)! Thanks, maintainers. Brian