8193.4 contains small, incremental fixes to the stable branch! Thank you all for reporting these issues. We know there are remaining open problems - we'll get to them in future incremental patches.

Fixes

• We fixed a thread race in the game client when receiving network packets on the builtin server, resulting in issues connecting to local servers.
  
• We fixed the configuration option server.restore-spell-uses-on-login.
  
• Palemaster natural AC progression has been restored to what it should be (it was off by one level after 4).
  
• The script call ActivatePortal() has been fixed to no longer show “Cryptographic Handshake Error”.
  
• A small memory issue in RESREF handling was addressed, that could occasionally crash clients when transitioning via ActivatePortal().
  
• The toolset will no longer try to deallocate the starting location when closing an area that does not have it.