I've been dealing with the latest release for two days now, and there are quite a few bugs. If you don't absolutely need the features of the new release, I recommend holding off until they work out the kinks.
Some of the issues include not being able to login to your admin area, and big problems with permalinks to your posts. They do have some fixes available for a few issues, but, in my humble opinion, it's not worth the time you have to put into it.
Just my two cents! But, once they get it de-bugged, this version is going to totally rawk!!