Details: http://www.drupal.org/node.php?id=7

- fix a _bug_ in "max threaded" mode

- fixed HTML typo in search.inc which confused Mozilla - thanks Carl and
  Keith.

- common.inc:
   + added a form_password() function

- variable_del(): small improvement/fix

- Fixed bug reported by Remco.

- Fixed bug in conf_init() not returning the default 'conf' when no
  matching configuration file is found.

- Removed the confusing comment as suggested by Jared.

- Changed the authentication and login scheme as discussed on the mailing
  list.
- Fixed the export function in book.module (patch my Julian).
- Fixed the comment alignment (comments got truncated).

- search is now default.
- search remembers your settings.
- save will dump you back to your last search.

- common.inc:
   + applied Julian's conf_init() patch

- format_username() now takes a second optional parameter which gives the
  real name of the user.

Rest
- updated the calls to format_username() where appropriate to show the name
  of the user instead of the account id. Clicking on a name will still give you
  the account info etc. If you find a place where the real name is not shown
  let me know.

- format_username() now takes a second optional parameter which gives the
  real name of the user.

Rest
- updated the calls to format_username() where appropriate to show the name
  of the user instead of the account id. Clicking on a name will still give you
  the account info etc. If you find a place where the real name is not shown
  let me know.

system.module
- made the words used in passwords configurable thru the admin interface.

- removed comment_controls().
- modified comment_render() to use $theme->comment_controls().

theme.inc
- added BaseTheme->comment_controls().

locale.module
- can now search for status independant of language.
- string is now a regular expression. For wildcard searches do .*text.*.
- can search in modules + pages, all modules or a specific module.

account.php
- fixed viewing other accounts info would show the active users name in the
  real name field.
- now shows users recent contributions and comments (if the user has access to
  them).

- removed comment_controls().
- modified comment_render() to use $theme->comment_controls().

theme.inc
- added BaseTheme->comment_controls().

locale.module
- can now search for status independant of language.
- string is now a regular expression. For wildcard searches do .*text.*.
- can search in modules + pages, all modules or a specific module.

account.php
- fixed viewing other accounts info would show the active users name in the
  real name field.
- now shows users recent contributions and comments (if the user has access to
  them).

- real name is now shown to all users.

page.module
- improved the locale support.

comment.inc
- added a wrapper table for comment_thread_max() as suggested by nick.

- Fixed '" should be &' problem in feeds.

- Various updates, mostly related to our RDF/RSS backend.

- import.module:
   + added new "tab" to import.module called "news sources".
   + improvement to import.module navigation.

- theme.inc:
   + renamed 'your contributions' to 'your submissions'.

- blog.module:
    + added RSS 0.91(5) feeds to the blog module which makes it possible
    to both syndicate an particular user's latest blog entries, or the
    latest entries of all users.

- blog.module:
   + added RSS 0.91(5) feeds to the blog module which makes it possible
     to both syndicate an particular user's latest blog entries, or the
     latest entries of all users.

- theme system:
    + added $theme->images()

- blog.module:
    + improved user-friendliness and rewrote most of the output routines
    + made quoted text /italic/ by default
    + integrated discussion system like it should
    + ...

- marvin.theme:
    + small visual improvements

Update of the box function in themes to allow a difference in style/output/look of a box() depending on the position on the page.
Basically this is a 'nice version' of a hack that you could do as a theme author.
I've updated all the standard themes, but 3rd party themes will of course have to be updated by their authors, in the following manner:

- Replace the box() declaration:
< function box($subject, $content) {
> function box($subject, $content, $region = "main") {

- Replace the theme_account call:
< theme_account($this);
> theme_account("region", $this);

Note that you'll have to replace "region" with the correct region that the box is placed in. However if you have a one-column theme, you should use "all", and not for example "left" (if all boxes are on the left).
Usually the "region" here should be the same as the nearest theme_blocks() call.

Those theme authors who want to can make boxes that appear in the center look different from those that appear in the sides for example.

- blog.module:
   + fixed visual glitch with 'read more' link (blog comments)
   + made it possible to delete your last blog item
   + fixed timestamp bug when previewing a new blog
   + fixed potential problem with blog_save()
   + fixed a few HTML/XHTML tinkos.

- statistics.module:
   + "yoursite.com" should no longer show up under "external referrers"
   + fixed "Referers of the last 31 years 37 weeks 1 hour 46 min 40 sec" bug
   + xhtml-ified

- node.inc:
   + fixed watchdog message

- import.module:
   + small block improvement

- Added blog.module to replace diary.module (contrubeted by Julian):
   + feedback wanted

- Added updated import.module (contributed by Julian):
   + user page do browse the headlines by feed and bundle, to display
     the item descriptions, etc.

- Fixed small bug in common.inc.

- Updated database.mysql

- account.php:
    + tidied up the texts

- common.inc:
    + undid bad coding style
    + fixed typo in permissions

- poll.module:
    + (automatically) removed tabs and trailing whitespaces

- Tidied up some stuff in account.php and theme.inc.
- Tidied up the box() API.

- common.inc:
   + Made '$na' translatable on popular demand.

- node.module:
   + replaced a confusing configuration description, as suggested by
     Remco.

- statistics.module:
   + Added a 'most recent referers'-table sorted by timestamp.

- drupal.module:
   + Small update of the links.

- Small updates

- Introduced caching support.

- Made search.php a module, being search.module.

- Updated the permission names to be more consistent.

- Small improvement to node.php.

- Tidied up node.inc and node.php a bit.

- Fixed annoyance in comment.inc.

Extremely large commit:

- Fixed tiny quote problem in account.php.

- Fixed tiny bug in comment.inc.

- Fixed tiny bug in comment.module.

- Fixed tiny bug in meta.module.

- Simplified user_access() API.

- Rewrote link system: still needs fine-tuning and testing so don't
  upgrade if you are running a production site. ;)

  Updated all modules and themes to reflect this change.  All other
  themes and modules need updating too!

- Fixed bug node.module bug:

    + the node scheduler did not un-schedule a node!

- Fixed comment bugs (as a result of the formification):

    + no signatures where being attached to the comments.

    + check_input was used where is should have been check_output,
      with broken filters as the immediate result.

- Fixed typo in comment.inc as result of form-ification.  Replying to
  a node was not possible: clicking the Preview button redirected you
  the main page.

- Fixed a few tiny bugs in comment.inc (introduced by the form-ification).