BTW, you're the person who reported on comp.lang.python that print int(5.0) produced 0, right? Under Python 2.2.2 (#1, Jan 24 2003, 17:43:45) [GCC 3.2.1 20021207 (Gentoo Linux 3.2.1-20021207)] on linux2 If so, you've got major problems with your Python installation, and should resolve those before testing Zope3.