WordPress 3.4 is very close to release now, but its makers deemed it necessary to roll out another beta. So the fourth beta is here, ready for your testing pleasure. It's all bug fixing and polishing at this stage and WordPress didn't even see it fit to say anything about it, other than the fact that it's out.
is an evolutionary update, as ever, but comes with several new features. On top of the list is the new Theme Customizer with real-time preview which enables users to add a lot more variety to the existing themes.
Other improvements are also from the "customization" department, the ability to have a flexible custom header size and the ability to change the custom header and background images from the Media Library.
WordPress 3.4 Beta 4
is available for download here