From Kerbal Space Program Wiki
1.6.1 is a bugfix update released on January 9, 2019 alongside a bugfix update for the Making History expansion.
- Fix collider on Stayputnik.
- Fix issue with partdatabase.cfg - Drag cubes and Mods causing issues with Mk-2 landercan and associated NREs.
- Fix unable to launch old ships with old Mk-2 landercan in career and science sandbox games.
- Fix What's new screen - Don't show again text disappearing when hovering.
- Fix some issues on high gravity or heavy vessels suspension stability introduced in 1.6.0 by changing maximum suspension damper clamp back to a value of 2.