An update to Team Fortress 2 has been released. The update will be applied automatically when you restart Team Fortress 2. The major changes include:
Weapon Updates

• The Shortstop
  • Reduced extra knockback penalty from 80% to 40%
• The Short Circuit
  • Added Penalty - No longer gain metal from dispensers when active
• The Cleaner's Carbine
  • Changed OnKill effect from gain crits for 3 seconds to gain mini-crits for 8 seconds
• Natascha
  • Added Positive Attribute +50% extra ammo
• The Reserve Shooter
  • Increased clip size from 3 to 4
  • Time to mini-crit airborne targets changed from 3 to 5
• The Beggar's Bazooka
  • Changed penalty No primary ammo from dispensers to no primary ammo from dispensers when active
• The Quick Fix
  • Fixed the Medic not gaining the proper speed boost when a Demoman uses the Chargin' Targe or Splendid Screen

Weapon Fixes

• Fixed deflected projectiles not affecting Strange and Killstreak counts
• Fixed the Mini-Sentry range-sphere not accurately displaying the range for the sentry when it is being placed
• Fixed the Spy's revolver using the incorrect reload sound
• Fixed third-person Medi Gun beams appearing jittery
• Fixed the Heavy not playing his response rules lines after eating a Sandvich, Buffalo Steak Sandvich, etc.
• Fixed The Half-Zatoichi using the wrong animations for the Loadout screen and the HUD 3D Character

Community Updates

• Added the Strongbox Key to the Mann Co. Store
• Added 43 community-contributed items to the Strongbox Crate
• Added the Tumblr Vs Reddit Participation Medal

Mann vs. Machine

• Added Killstreak Fabricators for the following weapons to the Two Cities Tour reward list:
  • The Lugermorph, The Big Kill, The Iron Curtain, The Frying Pan, The Black Rose, The AWPer Hand, Chargin' Targe, Splendid Screen, and The Mantreads
• Fixed an exploit that allowed players to purchase/sell the Canteen Specialist upgrade to get more money than they originally spent
• Fixed an exploit where players could stand on a robot's head to block their movement for an easy kill
• Fixed players not being able to earn the Frags to Riches achievement if there is money in the world when the mission is completed
• Fixed a bug that caused players to not receive an Upgrade Refund Credit when they should have
• Fixed the UI not updating properly if an Upgrade Refund Credit is earned after the wave has ended

Quickplay

• Added advanced options page, which allows you to search for a few commonly-requested non-vanilla options: 32-player servers, nocrits, and instant/modified respawn times
• Added "Show Servers" button to quickplay. This will run the normal quickplay search, but instead of joining the "best" server, it will present a list of about 20 servers and let you pick.

Other Changes

• Improved loading of item information panels to prevent hitches when cycling through backpack pages
  • Use the convar tf_time_loading_item_panels to control how much time is spent per frame loading item panel data.
• Fixed Australium items not using the correct images in the Steam Community Market
• Added missing payload audio for the Medic, Soldier, Demoman, and Spy
• Added the server command "sv_setsteamaccount" for logging in with a persistent game server account using a login token. Login tokens may be acquired via the IGameServersService/CreateAccount web API. Using a login token is not required to run a game server, but allows Steam users to continue to access your game server from their favorites list if your game server changes IP in the future.
• Added the game server's SteamID to the output of the status command
• Fixed the Killstreak counts not being accurately portrayed in the scoreboard
• Fixed seeing the incorrect LOD settings for models when they are being previewed during submission to the Steam Workshop
• Fixed a UV/skinning problem on the level 1 sentry
• Fixed a problem where "activate virtual reality" doesn't work if you have 2 monitors + headset
• Fixed a client crash caused by trying to load an invalid URL
• Fixed achievements getting stuck in a completed state and not being awarded to the player
• Fixed not hearing hit sounds after a level change when using tf_dingalingaling_repeat_delay
• Fixed the "equipped" label being displayed on incorrect backpack panels when equipping items
• Fixed the upper-left backpack panel always being highlighted when equipping items
• Fixed player names being clipped by item images in the Freeze Cam and Inspect panels
• Updated the equip_region for The Extra Layer
• Updated the Blue team material for the Ambassador to be less red
• Updated ctf_2fort
  • Fixed a rendering bug on a silo prop in the skybox area for the Blue base