WordPress 2.3.1 is now available. 2.3.1 is a bug-fix and security release for the 2.3 series.
2.3.1 fixes over twenty bugs. Some of the notable fixes are:
- Tagging support for Windows Live Writer
- Fixes for a login bug that affected those with a Blog Address different than their WordPress Address
- Faster taxonomy database queries, especially tag intersection queries
- Link importer fixes