Good to hear. And yes the framerate here is really really bad. I downloaded an external FPS-Monitor and checked again: On "Fantastic" at 1280X800 i get 4 FPS maximum.
So i turned resolution and quality down until i got stable 30+ FPS (at 512 x 384 px, windowed Quality: Fastest i get 39 FPS) and tested again:
The mouse-movement related issued have totaly vanished. Ship and camera turn just fine.
The "Nervousness" of the flaps and maneuvering thrusters is gone.
But i still can't stop. I continue to move on with 0.1 m/s at full-stop.
Some pictures here