Steam have released an update for Team Fortress 2 that will apply automatically to your client as soon as you log in next time. The update includes some of the following:
- Added The Force-A-Nature, The Sandman, and Bonk!
- Added 35 new Scout achievements
- Added "First Blood" to Arena mode
- Fixed a bug where players would sometimes gib from non-gib damage kills
- Fixed stat screen showing an entry for a class called "map."
- Fixed item model panels not using team skins
There are also two new maps as part of the update, but you can find the full list of additions and fixes right here