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:

• Added new promo items
• Fixed a client crash caused by trying to load an invalid URL
• Fixed Medigun particle beams not always appearing while healing players in DirectX 8
• Fixed a case where clients would hear/see crit effects when their attack was not a crit
• Fixed the Carbonado Botkiller Minigun using the incorrect material for the Minigun
• Fixed a Mann vs. Machine bug related to upgrades after a retry/reconnect
• Updated the Unarmed Combat to add the item_type description
• Updated sv_pure so client will detect corrupt or modified VPK files
  • Use Steam to verify local cache to fix corrupt files
  • Use the custom folder to customize the game
• Item server stability:
  • Improved performance when manipulating multiple items at the same time (claiming multiple item drops, etc.)
  • Improved performance fetching persona names for item descriptions (gifted by, etc.)
  • Improved performance generating Steam Community Market data for item tooltips