WordPress version 3.8.1 is now available for download. This new version is a maintenance release which addresses over 30 bugs in WordPress 3.8. If you have not done so already – please make sure you update your WordPress installation.

You can read more about the update: http://core.trac.wordpress.org/query?status=closed&group=resolution&milestone=3.8.1

You can download WordPress 3.8.1: http://wordpress.org/wordpress-3.8.1.zip