There are some inconsistencies with the resources/php_compact_info.json. For example, ArrayAccess and Iterator, for example, are both attributed to PHP 5.3.0 instead of 5.0.0 as stated in the PHP documentation.

Instead of trying to work out why this happened, I figure that it would be better to update scripts/update_compact_info.php to work with the latest version of PHP_CompatInfo (version 3.1.0). The only caveat here is that v3.0.0+ of PHP_CompatInfo requires PHP 5.3.0. Since this script is intended only for developers and is rarely used, this shouldnt be a significant issue.