I've packaged what looks the be the final RC for the 5.2.1 release, RC4. This release fixes another dozen or so bugs since the last release and from the given feedback looks to be regression free. That said I'd like to ask everyone to take a few minutes and try this RC with their code to make sure it really is as good as it seems and to ensure no new issues are introduced.
If you come across any issue please let me know via http://bugs.php.net, this blog, or internals mailing list.
Are you considering to upgrade the SQLite library to 3.3.12?
Will the MySQL client library be upgraded from 5.0.22 to 5.0.33 on Windows?
Besides, some of the downloadable documentation CHMs do not work anymore after the last update, at least English and German.
They went from 7 MB before to 5 MB now.