WordPress 3.4 Beta 1

If all goes well, WordPress hope to release WordPress 3.4 in May.

Here’s some of what’s new:

Theme Customizer with Previewer
Flexible Custom Header Sizes
Selecting Custom Header and Background Images from Media Library
Better experience searching for and choosing a theme

And some of the under-the-hood changes:

New XML-RPC API for external and mobile applications
New API for registering theme support for custom headers and backgrounds
Performance improvements to WP_Query by splitting the query (Please test!)
Internationalization improvements (improved performance and locale support)
Performance and API improvements when working with lists of installed themes
Support for installing child themes from the WordPress Themes Directory


http://wordpress.org/news/2012/04/wordpress-3-4-beta-1/

~ Katy