I just noticed something - the rotPeriod for Kerbin in the bodies.ini file I just generated to make sure it wasn't some earlier issue is defined as 21600 - which is the default. I have a MM config for Kopernicus that sets it back to the original period of 21651 (because I hate the sunrise/sunset being at the same time everyday): @Kopernicus:FINAL { @Body[Kerbin] { @Properties { // return Kerbin to old pre-v1.0.5 rotation period %rotationPeriod = 21651 } } } w