- A theme customizer that lets you change your site’s settings and styles in one interface.
- Automatic Twitter embeds. Paste the URL of a Tweet into one of your posts and it will automatically show up in the post, like the example below.
- HTML Image Captions. When writing an image caption you can include some HTML tags like <b>, <i>, and <a> to add information to your caption.
WordPress 3.4 is here! Update your site now to try the new theme customizer, better headers, HTML captions & more: http://t.co/tHpz0Mau
— WordPress (@WordPress) June 13, 2012
Here’s a video that highlights these features.