A new maintenance version has come out, fixing a few bugs, and adding a few features (nicest one – pinging is handled better on publishing, so you get the long delay a little later, interfering less).
Upgrading is not as simple as the last one, because many more files are affected. Best to follow their official recommendation for upgrading instead.
For more info, drop by their source tracking site to read about bug fixes and changes.
Oh, and when upgrading don’t forget to turn off plugins FIRST – it ranks right up there as one of my most annoying upgrade issues if forgotten…