The second release candidate for WordPress 3.1 is now available. Changes since RC1:

• The security fixes included in WordPress 3.0.4
• Fix issues related to handling a static front page
• Fixes and enhancements for the pagination buttons
• Fix searching for partial usernames
• Properly reactivate plugins after editing them
• Always show the current author in the author dropdown when editing a post
• Fixes for attachment taxonomies
• Fix node removal for the admin bar
• Fix the custom post type show_in_menu argument
• Various fixes for right-to-left languages
• and a few dozen more changes