This version has a few security bug fixes and a fix for Feedburner to work again.
Changes from 2.0.6
Security fix for wp_unregister_GLOBALS() to work around the zend_hash_del_key_or_index bug in PHP 4 versions less than 4.4.3 and PHP 5 versions less than 5.1.4 with register_globals set to “On.”
Feeds now properly serve 304 Not Modified headers instead of [...]