It looks like it might be
1.7.2, but I didn't find any definitive, "THIS IS THE CURRENT VERSION OF PEAR" on the pear website.
I'm trying to upgrade PEAR on a system that I'm not all that familiar with.
pear version yields...
PEAR Version: 1.4.9 PHP Version: 5.1.6 Zend Engine Version: 2.1.0 Running on: Linux...
pear upgrade pear and this message was included.
pear/PEAR dependency package "pear/Archive_Tar" installed version 1.3.5 is not the recommended version 1.3.3, but may be compatible, use --force to install pear/Archive_Tar requires PEAR Installer (version >= 1.5.4), installed version is 1.4.9