The focus of this release is twofold, number one we are continuing to stabilize the language, with over 60 bug fixes. The second goal was to improve the security of the language through an internal audit as well as by addressing previously unknown bugs identified by MOPB. As you can imagine both these goals result in a rather extensive set of changes, so testing to make sure no new bugs or regressions were introduced is critical. Therefor I would like to ask everyone, over the next few weeks to give this RC a shot with your code base to ensure there are no problems. I want to make 5.2.2 go out as soon as possible given the security improvements that it brings, with the next RC slated at just over 2 weeks from today (April 26th) and the final in early May.
If you come across any problems feel free to identify them by replying to this blog entry or by creating a bug report on http://bugs.php.net.