WordPress 3.3 released!

From: http://codex.wordpress.org/Version_3.3

Here is a short video outlining the highlights!

Highlights

• Easier Uploading
  • File Type Detection – A single upload button.
  • Drag-and-Drop Media Uploader
• Dashboard Design
  • New Toolbar in the dashboard, combining the Admin Bar and admin header
  • Responsive design for some screens, including iPad/tablet support
  • Flyout menus, providing single-click access to any screen
• New User Experience
  • New feature pointers, helping users navigate new features
  • Post-update About screen
  • Dashboard welcome area for new installs
• Content Tools
  • Better co-editing that releases post locks immediately
  • Tumblr Importer
  • Don’t lose widgets when switching themes
• Under the Hood improvements
  • Use the postname permalink structure without a performance penalty
  • Improved Editor API
  • is_main_query() function and WP_Query method
  • Remove a number of funky characters from post slugs
  • jQuery 1.7.1 and jQuery 1.8.16
  • A new Screen API for adding help documentation and adapting to screen contexts
  • Improved metadata API
• Performance improvements and hundreds of bug fixes

MAKE SURE YOU BACK UP YOUR SITE BEFORE UPGRADING! Remember, safety first!

http://codex.wordpress.org/Version_3.3