WordPress 3.6 is here.   One of the new features is: Revamped Revisions save every change and the new interface allows you to scroll easily through changes to see line-by-line who changed what and when.

Other new features include:

  • The new Twenty Thirteen theme
  • Post Locking and Augmented Autosave
  • Built-in HTML5 media player
  • The Menu Editor

New Developer features added as well.  Check it out here