PHP 5.4.11 and 5.3.21 were released on January 17, 2013. There have been quite a few changes since PHP 5.4.8 and 5.3.18. The complete official changelog can be found here. I believe PHP 5.4.12 and 5.3.22 will be released soon and I will try to compile and post them as soon as they are released.
Anyway, as promised, here are the 64 bit builds of PHP 5.4.11 and 5.3.21 for Windows. As usual they were compiled with Visual C++ 2008 (VC 9). And I have compiled them against newer versions of ICU (50.1.2), libjpeg (9), libpng (1.5.14), freetype (2.4.11), curl (7.29.0), libssh2 (1.4.3), libxslt (1.1.28) and openssl (1.0.1d).
PHP 5.4.11 (Thread Safe)
PHP 5.4.11 (Non Thread Safe)
PHP 5.3.21 (Thread Safe)
PHP 5.3.21 (Non Thread Safe)
Additional extensions can be found in the following mediafire folder.
Newly compiled extensions are located in the 5.3 and 5.4 sub folders.