On OS X 10.6 (Snow Leopard) the default python version is 2.6. Python 2.5 is also available, but is kind of hacky. Part of the problem is that python2.5 doesn't compile as a framework. Another (possibly related) problem is that Tk depends on Carbon (at least the "native" version does) and Carbon no longer exists in 10.6. See http://bugs.python.org/issue6802 for details. I'm relying both on MacPorts and Chimera for dependencies, so I need them to be in sync (for example, boost.python built against python2.6 won't work with Chimera's python2.5). I could try to hack around the python2.5 problems on 10.6, but it'd be nice if I could drop in python2.6 in Chimera and everything would "just work." This is unlikely going to be the case, so I was wondering if the Chimera team already has a switch to python2.6 planned in its development roadmap. -- Mark