WordPress 3.4.2 Upgrade
WordPress released version 3.4.2 yesterday.
It is a maintenance release, fixing bugs and improving security. You can see more information regarding the changes at the WordPress Codex article on 3.4.2.
If your site at Lightning Base is set to auto-upgrade for minor or major core updates, it was upgraded last night. You should have emails both informing that your site was backed up, and that an upgrade was completed.
As always, if you need help performing an upgrade or have issues with the new version, please get in touch. This is a minor release so it should be safe to upgrade most sites already on 3.4.x.