In a quick note from PHP.net today:

PHP Development Team is proud to announce the immediate release of PHP 5.0.2. This is a maintenance release that in addition to many non-critical bug fixes, addresses a problem with GPC input processing. All Users of PHP 5 are encouraged to upgrade to this release as soon as possible.

For changes since PHP 5.0.1, please consult the ChangeLog.

Other changes made include adding a new (boolean) parameter to array_slice(), adding a new flag to sort() to make it sort based on the current locale, and the implementation of a "periodic PCRE compiled regexp cache cleanup" to keep the memory clean. There's also lots of bugs corrected as well - so, get on over and upgrade to this new release!