And one more thing, WordPress can't work on PHP 5.2 anyway: there are some features that require PHP 5.3 and they are part of the WordPress core, including SimplePIE used for all RSS feed stuff in WordPress. That library doesn't work with PHP 5.2. I remember that there are few more libraries that have the similar limitation.

So, all this 'we support PHP 5.2' is a nonsense, and WordPress core should move on and take the lead in the newer PHP adoption. PHP 5.5 or 5.6 should be set as the minimum requirement, and revisit the PHP versions support once a year.