Seems that the Wordpress team goes on a bug hunt every weekend, this time releasing more than 70 fixes, although this is more of a security release than a feature pack.

Nothing much special about this, if you don’t wish to upgrade, you can simply update the folders via FTP, here are the folder fixes: wp-includes/pluggable.php, wp-admin/includes/media.php, and wp-admin/media.php.

Well here are total fixes:

• Performance improvements for the Dashboard, Write Post, and Edit Comments pages.
• Better performance for those who have many categories
• Media Uploader fixes
• An upgrade to TinyMCE 3.0.7
• Widget Administration fixes
• Various usability improvements
• Layout fixes for IE

Source: Wordpress