I have this problem, it's that I constantly move forward in midair. When I jet or jump, I consistently fly forward as fast as I possibly can go. Quite annoying, when I jump I fly forward the length of two 64x64 baseplates...
I can already tell you that I have played around with controls and advanced options to find the solution. It's not a console command as far as I can see, I have tried moveforward(); and many others. It's also not the jump-jet combo, I have that disabled. If any of you know the solution, please post.