EDIT: New Update to Test Server at around 3:30pm

Client Version 0.81.1.57124, Steam Build ID 720376

• More adjustments to AI and spawning
  
• Changes to address invisible players
  
• Changes to make vehicles more persistent
  
• Fixes to help prevent additional cases for vehicles not staying on top of objects
  
• a few assorted crash fixes
  

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EDIT: This is from the morning update:

Client Version 0.80.1.56986, Steam Build ID 719018

Much of what's being tested here is on the server side, but here's a couple of things to watch out for. There are a few things still in progress, so please pay special attention to and help us with feedback on:

• Cases of riding player’s camera flipping out while being driven around
  
• Cases of damage dealt when player is logging in
  
• AI responsiveness and overall spawning
  
• Overall stability of the game client
  

Source