- When user #1 creates an account (we can assume this happens only once), system.module's schema version is set to the latest availiable.
  - system_get_files_database() now includes a 'schema_version' child of each file object.
  - That new information is re-saved when Drupal re-populates the system table.
  - An array of newly-enabled modules is built, module_list() is reloaded, and the schema versions of each newly-enabled module are set to the most recent availiable. If the schema version is already set (presumably from a previous installation) it is not changed.

- Patch #40303 by Cvbge: drop old columns for PostgreSQL and fixed some PostgreSQL problems in the update script.

  There are a number of small optimizations we could add; like, we should never do more lookup queries than the number of unique URL aliases in the database.  When the size of the static cache equals the number of unique URL aliases in the database, we can stop doing lookups.  I think this could be implemented with a 2-line change.  Takers?

- Patch #38889 by rkerr: db_error and db_affected_rows did not work properly in presence of multiple database connections.

- Patch #40139 by Robert: the system table got a new column, the database definition files need to reflect this.

- Patch #39778 by chx: obliterate nodeapi op form in favor of the forms API's way of doing things.  Tested with help from webchick.

- Patch #39778 by chx: obliterate nodeapi op form in favor of the forms API's way of doing things.  Tested with help from webchick.

  Moves callbacks and arguments to a separate data structure from the visible menu tree. As mentioned on drupal-devel, this change has little impact except to slightly improve code legibility and prepare the code base for future separation of these tasks, with an eye toward performance improvements of the menu system.  Also changes array_key_exists() to isset() in several places, which is reported to perform better.

- Patch #32665 by Richard Archer: add more functionality to menu item settings on node/*/edit pages.

- Patch #38849 by wtanaka: forum icon does not display as locked (aka closed) if comments are "disabled" instead of "read only".