A release candidate is out for Wordpress 2.3.1.  It seems like only yesterday that I installed Wordpress 2.3.  These type of updates for bug fixes are typical and, in my opinion, actually a good things to see.  Wordpress 2.3.1 will be fixing over twenty bugs. Some of the notable fixes are:

• Tagging support for Windows Live Writer
• A login bug that affected those with a Blog Address different than
  their WordPress Address is fixed
• Faster taxonomy database queries, especially tag intersection queries
• Link importer fixes