I just want to add, doing a quick test on a fresh install, I was able to reproduce this issue using the following mods at the time: ModuleManager ModularFlightIntegrator HyperEdit It required reloading a quicksave made before the retrograde burn. To me this suggests an issue with ModularFlightIntegrator since I never used FAR for that install at all, and removing ModularFlightIntegrator allowed me to load the save without the issue occurring. Can anyone also verify this? One other thing, the fact that this issue happens at about 750m/s makes me think Krakensbane might be related in some way.