I've just put out a mini update with a few bug fixes for the recent big patch in publicbeta. Here's the change list:

• Fix for Dark Past quests failing immediately
  
• Fix for physics slowdown when mods include colliders on weapons
  
• Fix for being able to right click to transfer gifts
  
• Fix for crash that sometimes happened when zombies eat a corpse
  
• Fix for Out Of Sync error
  
• In script editor, when language is set to something other than English, show the translation in that language as well
  

EDIT - as mentioned in the comments, this introduced some new bugs, which are now fixed in v157. Here's the change list for that:

• Fix for funeral squads getting stuck in the AttackThreat state
  
• Fix for crash when zombies eat a thrown item
  
• Fix for thrown objects not bouncing properly
  

What's this publicbeta thing?

v157 will be in the "publicbeta" branch for a while, before pushing it to the main game. If you want to try the latest features as they come out (and help test them!) it's a good idea to start using this branch. But keep in mind:

• Because it's the bleeding edge it could be less stable
  
• If you want to be able to play online co-op with someone you'll need to be on the same version as them
  
• If you go back from the "publicbeta" branch to the main branch you may not be able to load savegames created on "publicbeta".

To use publicbeta, just right-click on Survivalist: Invisible Strain in your Steam library and go to Properties, then Betas and in the drop-down select "publicbeta".