KSP: 0.25 Windows 8 - 64 Bit Mods installed: Kerbal Engineer MechJeb2 StationScience EnvironmentalVisualEnhancements Problem: I have suffered this bug three times with completely different ships. A few seconds after reaching orbit, the apoapsis starts increasing really fast, achieving an escape trajectory in about a minute. The engines and RCS are shutdown, there is no fuel consumption. The ship just accelerates without any apparent reason. I cannot increase time compression, because the game considers the ship is accelerating. Using the engines doesn't seem to have any effect. If I wait enough, sometimes some pieces of the ship break apart. In other cases the whole ship explodes. In two of the cases I experienced another bug with the same ships. I stayed many minutes in the launch pad to wait a station to fly over. Then, after first stage ignition, there was no lift off. The ship just stayed in the platform until fuel ran out. I reverted the flight to launch and started ignition inmediately, achieving an easy lift off, but after reaching orbit, the former apoapsis-increasing bug appeared. There is obviously a connection between both bugs, because I have never seen one without the other. Reproduction steps: This is the last ship with which I experienced both bugs: https://dl.dropboxusercontent.com/u/31996699/Station%20Resupply.craft 1) Wait an hour in the launch pad and then start ignition with full throttle. It will stay in the launch pad. 2) Revert flight to launch. 3) Lift off inmediately and reach a 75km orbit using MechJeb. 4) Wait a few seconds until the apoapsis starts increasing. Note: I have just followed this steps and I was able to succesfully dock with the station. I assume the cause of the bug is not the ship, but something that is solved reseting the game. Anyway, if someone could give me any clue to avoid this happening again, I would be really thankful.