WordPress version 3.8.3 is now available for download. This update addresses an issue with the “Quick Draft” option in the dashboard where a post created there would disappear/not save. If you use this feature – please make sure to update WordPress. Even if you do not use it – it is always a good idea to update WordPress.
You can read more about the update: http://core.trac.wordpress.org/query?status=closed&group=resolution&milestone=3.8.3
You can download WordPress 3.8.3: http://wordpress.org/wordpress-3.8.3.zip