- Patch #599804 by effulgentsia, catch: unify page, AJAX 'path', and AJAX 'callback' callbacks. Oh my, this is the beginning of something big.

- Patch #601570 by effulgentsia: hook_exit() and other cleanup needs to happen for AJAX requests too.

- Patch #556438 by rfay, effulgentsia, sun | quicksketch, Rob Loach, Dries, sun.core, Damien Tournoud: Fixed AJAX/AHAH 'callback' support only works for 'submit' and 'button' elements - Should work for all triggering elements.

- Patch #551694 by effulgentsia, rfay, sun | moshe weitzman, Dries: standardized the return of status messages in AJAX callbacks.

- Patch #556018 by Damien Tournoud, dereine | sun: rename drupal_to_js() and drupal_json() for consistency and readability.

Patch #579366 by sun, litwol | chx, Dries: simplified form API redirection handling. I can actually understand it now. ;-).

- Patch by #565496 by dropcube, pwolanin: changed Allow dynamic attaching of other types of stuff to render() structures.

#367567 by effulgentsia, yched, quicksketch, sun, and chx: Move AHAH-'add more' to the new generic AHAH callback, and add support for form definition functions being kept in non-.module files.

#497118 by chx, catch, pwolanin, JoshuaRogers, and Jacob Singh: Remove the function registry. While the hope was that this would result in improved performance for low-end hosts, it comes at the expense of critical development experience problems and less benefit than something like APC. Class registry remains intact to facilitate autoloading.

Of all the patches to accidentally commit without a message. :( Rolling back registry rip. Let's try that again.