Unlike other aspects of PEAR development, the windows build of PHP 4.3.x is not tracked in CVS. Instead, it is located on the machine that builds windows snapshots. Often, this will not be updated when the rest of PEAR is updated. Note that PHP 5.x releases use a different build system and are automatically updated to the latest versions of PEAR.
If you find that PHP 4.3.x has out-of-date versions of packages, or no longer works, then please report that the windows bundle of PEAR is out of date to firstname.lastname@example.org