Improvements include: write-in support, refactoring of the date/runtime functionality, permissions overhaul (requires that they be reassigned to the relevant roles), per-content type settings, massive code cleanup, and various other bug fixes and usability improvements.
Minor bugs fixed (also thanks to Michał Albrecht).
Bug fix for image paths in Drupals installed in subfolders ( problem identified by fuzzion in http://drupal.org/node/176939#comment-308093 ).