After a couple of months of work and 2 release candidates PHP4.4.0 has been released! See the changelog for details of what's new. All Users of PHP are strongly encouraged to upgrade to this release.

PHP Development Team is would like to announce the immediate release of PHP 4.4.0. This is a maintenance release that addresses a serious memory corruption problem within PHP concerning references. If references were used in a wrong way, PHP would often create memory corruptions which would not always surface and be visible. In other cases it can cause variables and objects to change type or class. If you encountered strange behavior like this, this release might fix it. The increased middle digit was required because the fix that corrected the problem with references changed PHP's internal API. Because of this all binary extension modules need to be recompiled for work with this release again.