Aaron Brazell has written an excellent round-up, with 10 Things You Need to Know About WordPress 2.3:
With WordPress 2.3 to be released on September 24, 2007, I think it’s appropriate to follow the tradition and let you know about the ten things I think you should know about WordPress 2.3.
It sounds as though there are some quite big changes under the hood. If you’re like me and like to upgrade instantly, then it sounds as though backing up first would be very smart.
I think I might actually wait a short while on this one, as I’m pretty busy and don’t have time to troubleshoot problems right now.