Version 4.0.6 of the Akismet plugin for WordPress is now available. If you are paying attention to version numbers, you will notice that we went from 4.0.3 to 4.0.6 in one day. This is because we got user reports of issues with older versions of PHP with our intermediary versions, which we jumped on fixing right away.
4.0.6 contains the following changes:
Added tools to control the display of a privacy related notice under comment forms.
Fixed HTML in activation failure message to close META and HEAD tag properly.
Fixed a bug that would sometimes prevent Akismet from being correctly auto-configured.
To upgrade, visit the Updates page of your WordPress dashboard and follow the instructions. If you need to download the plugin zip file directly, links to all versions are available in the WordPress plugins directory.