Hardening release? Really?
Anyway, version 2.8.5 of popular blogging platform WordPress is available and it features code cleanup and addresses some potential issues. You should upgrade as always, either from within your WordPress install, or by downloading from wordpress.org.
In other WordPress news, the team is pimping the exploit scanner plugin which sounds like a good idea if you think your WordPress site might have been hit, and also urges you to participate in the 2.9 beta testing.