Apache HTTP Server 2.2.22 was released recently (January 31, 2012). As usual, this version is a security and bug fix release. A list of security vulnerabilities that were fixed can be found here. The complete official changelog can be found here. And here are the 32 bit and 64 bit binaries for Windows.
The binaries were compiled with Visual C++ 2008 (MSVC9) against latest versions of OpenSSL (1.0.0g) and zlib (1.2.6), and have IPv6 support. The 64 bit binaries no longer have the bug that was causing Apache to crash when mod_rewrite logging was enabled.
The installers are not digitally signed this time since my code signing certificate has expired. So, please use the provided file hashes instead to verify the integrity of the installers.