though version 1.3.2 has been out for years
Release date: 2007-04-13
And that was after the release of XAMPP 1.6.1-beta: 2007-04-10
There are only bugfixes between beta and final release of a package.
(BTW: There are other things in XAMPP ehich are really outdated
If someone really works with PEAR, it's a good idea to delete the one from XAMPP and install a fresh PEAR from scratch.