Kerbal Space Program

I had the same Problem.

After changing the terrain detal to normal this error no longer occurs. Bevore i had terrain level at low quality.
Terrain shaders and scatters are now disabled too.

Hmmm, default terrain detail does indeed seem to fix it. Unfortunately, it also kills my framerate on any planet with an ocean, while it makes almost no difference in performance on planets that don't. Oceans have been known to kill performance for some time now, so i had set my terrain to low to get a playable framerate on Kerbin. Now that i actually need Default for the rovers, though, i modified the config settings for all the oceans to be the same as on Low (similar to the old water fix). It works pretty well, the rovers move fine, the framerate is fine and the water seems to be ok, or at least ok enough for me (i don't build boats or anything).

I still think it's weird though, my understanding was that the terrain detail just altered the terrain vertex density, i don't get how that can mess with physics this badly. Then again, the game is in alpha so some weirdness is to be expected i suppose. It still is an issue, however. Even though i found a fix, it's a "hacky" fix. There might be a better/permanent way to solve this on the developers' side of things.

I've had the same issue. I then tried out normal detail, which was better but reduced my framerate too much. It also resumed with my rover floating in the air. When I tried returning to low detail, my rover has ended up stuck underground.