Ah yes, with your help I seem to have solved my own problem. I had PYTHONPATH defined to point to the 2.5 directory.
Best to avoid setting PYTHONPATH at all. If you install new packages into a standard place like site-packages, and use .pth files for those libraries that aren't packages, there should be no need to set PYTHONPATH.
-- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list