Issue #1260932 by DjebbZ, pwolanin: hook_nodeapi() optional arguments should not be made required by some core modules either

Issue #925580 by tbenice, rsevero, marcp: dix upload modules's form altering to be clearly compatible with PHP 5.3

#323438 by emok, chx, mfb: uploaded files become arrays in previews, so object property checking will not work on them (from PHP 5.2.12+)

#360605 by Berdir et al.: make Drupal core work with PHP 5.3.0 out of the box (fixes for incompatibilities introduced with PHP 5.3.0)

#219883 report by brianshumate, patch by gdevlugt, webernet: remove code cruft with 'upload_current_file' session variable, which was causing bugs

#219334 report by catch, patch by myself: upload table created in upgrade and upload table created by upload module enabled later collides

#18954 by kkaefer, Pancho: built-in role names were not translated and some user_roles() call cleanups

- Patch #199955 by saxofaan: file_upload_max_size() returns results in bytes, not in mega bytes.

- Patch #164532 by catch, pwolanin, David Strauss, et al.: improve table indicies for common queries.

#200069 by keith.smith: new standard for 'more information' links in module help texts, as the handbook we referred to before was renamed

#197297 by DanW (as GHOP 17), and keith.smith: clean up lots of help texts, update to drag and drop functionality, drupal.module removal, etc

 - whitespaces at end of lines
 - indentation
 - control structure usage
 - whitespace in empty lines
 - phpdoc comment formatting

#191104 by keith.smith: (usability) change occurances of node to 'post' and 'content' as appropriate

#172943 by drewish: fix file_save_upload() conformance to its API documentation by treating the 'dest' param as a directory. Also fixes #176876 so temporary files are properly stored in the temp directory.

#181088 by fajerstarter, catch and JirkaRybka: rename 'access control' to 'permissions' for usability reasons

#181741 by quicksketch: fix AHAH throbber/progress bar issues and generalize progress display configuration to allow module developers to choose from the throbber and progress bar

- Patch #150245 by webchick, bjaspan, ralf, Arancaytar et al: move the .schema files into .install files to prevent mistakes.

#157752 by quicksketch: extend AHAH functionality to most types of form elements, without writing JavaScript. Also AHAH enable the blocks admin page.