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:

• Fixed a client crash caused by low detail skeletons
  
• Fixed a dedicated server crash related to gamestats
  
• Fixed a dedicated server crash caused by the payload carts getting stuck
  
• Fixed green zombies not spawning on Linux dedicated servers
  
• Fixed broken melee animations for some all-class weapons
  
• Fixed players being able to issue the "boo" command when they are not ghosts
  
• Fixed cloaked Spies losing their spells if they attempted to cast them while cloaked
  
• Fixed the stealth spell only lasting for 2 seconds instead of 8 seconds
  
• Fixed players keeping their spells if they were rolling for them while leaving hell
  
• Fixed not switching back to the normal weapon if a spell was cast while standing on another spell
  
• Updated spells so they cannot be deflected