I haven't been here for ages, so forgive me if I've putted this into the wrong part of the forums.
Let me get started. So I had a mission to Minmus. When I've putted my vessel into orbit, or to be more precise around ~100km circular orbit, I left it there. I went out for a while, and when I got back my periapsis is below the surface already.
Lucky me I did a quicksave before being AFK, so I quickloaded and checked the readouts from KER. Appareantly I'm decelerating by 0.01m/s^2.
What could be the cause for this? Clipped parts, maybe? I have a lot of them in the vessel. As for mods, here are the ones I use:
ModuleManger (duh)
KER (again, duh)
Kerbal Alarm Clock
StowedWheelFix (it's just .cfg, I doubt it will do much harm)
BetterBurnTime
and a two graphic mods: PlanetShine and Distant Object Enhancement
Please help, I have not loaded my vessel till now in fear of wasting delta-v.