WordPress 3.4.2 is out now

Warning: A bug involving Custom Fields has crept into 3.4.2. If you add or update Custom Fields in your posts, you may have problems. See this Trac ticket for the technical details, and if you haven’t updated, consider holding off until a patch appears, probably very soon.

There’s another maintenance release of WordPress available, which squashes some bugs and fixes some security issues. All users are advised to upgrade sooner rather than later. The automagic thingy did its job in a few seconds on this site. Full details and links from the official source:

WordPress 3.4.2