OSX Leopard (10.5.4)
Python-3.0b2 tarball 

./configure --enable-universalsdk --enable-framework 
make
sudo make install 

Ends with this error:
cd PythonLauncher && make install DESTDIR=
test -d "/Applications/Python 3.0" || mkdir -p "/Applications/Python 3.0"
test -d "/Applications/Python 3.0/Python Launcher.app" && rm -r
"/Applications/Python 3.0/Python Launcher.app"
cp -r "Python Launcher.app" "/Applications/Python 3.0"
touch "/Applications/Python 3.0/Python Launcher.app"
test -d "/Applications/Python 3.0" || mkdir -p "/Applications/Python 3.0"
test -d "/Applications/Python 3.0/IDLE.app" && rm -r
"/Applications/Python 3.0/IDLE.app"
make[1]: [install_IDLE] Error 1 (ignored)
cp -PR IDLE/IDLE.app "/Applications/Python 3.0"
cp: Warning: the meaning of `-P' will change in the future to conform to
POSIX.
Use `--parents' for the old meaning, and `--no-dereference' for the new one.
ln -sf
/Library/Frameworks/Python.framework/Versions/3.0/Resources/Python.app/Contents/MacOS/Python
"/Applications/Python 3.0/IDLE.app/Contents/MacOS/Python"
ln: creating symbolic link `/Applications/Python
3.0/IDLE.app/Contents/MacOS/Python' to
`/Library/Frameworks/Python.framework/Versions/3.0/Resources/Python.app/Contents/MacOS/Python':
No such file or directory
make[1]: *** [install_IDLE] Error 1
make: *** [frameworkinstallapps] Error 2


It looks like this is due to fink's cp being found first on the PATH. 
Temporarily disabling /sw/bin/cp so /bin/cp would be found first then
the install finished.