Zend Framework changes quickly, so the easiest way to maintain your server installment for all platforms is the google code pear channel. That’s the only channel that seem to be updated on a regular basis.
pear channel-discover zend.googlecode.com/svn
pear install zend/zend OR pear install zend/zend-1.10.6 (choose the version # you want)
… and at any time you can upgrade using
pear upgrade-all
Now you’ll always have the latest and greatest releases of the Zend Framework installed. Happy coding