WordPress 3.4.1 has been released and available for download with new existing features such as Live Theme Previews, Twitter Embeds, smooth release, and copies are flying off the shelf And More. You can also find more information in their WordPress Official Blog .
Some best WordPress 3.4.1 Features
In this Version 3.4.1 addressed some security issues and fixed 21 bugs. For more information, see the release notes.
In WordPress Version 3.4.1 they fixes a few security issues and contains some security hardening. The vulnerabilities included potential information disclosure as well as an bug that affects multisite installs with untrusted users. These issues were discovered and fixed by the WordPress security team.