On PHP.net they've announced the release of the beta3 for PHP 5.5.x with some bugfixes from the previous beta release.
The PHP development team announces the release of the 3rd beta of PHP 5.5.0. This release fixes some bugs against beta 2. This is a development preview - do not use it in production. PHP 5.5.0beta3 is shipped with some bug fixes and improvements.
Updates include the dropping of bison <2.4 support, a fix for the DateTime serialize/unserialize and an update to the key handling in foreaches. You can see information on these changes and many more in the NEWS file and can download the beta release from the usual sources: source, Windows binaries.