If you are looking for specific fixes in this exact build (3970), it was a minor "hotfix" aimed at stabilizing the 1.1 update, resolving issues with base building physics and multiplayer connectivity.
Located in the bottom corner to help players identify their current version for multiplayer compatibility.
Expanded building options, including the ability to build on trees and new structural supports.
Added the Chimney, Spiral Staircases, and half-walls for more creative base designs.
Used by developers to pinpoint exactly which code branch was running during a game error.
Temporary seasonal items like Christmas trees and lights were added to the backyard. Technical Meaning of "[v1.1.0.3970]"