Hans,The problem has nothing to do with propellor torque. It's almost as if the ground is shifting sideways beneath the plane ! It occurs with EVERY SINGLE plane that I use (jets and props), but it doesn't occur everywhere.I often wonder if it has something to do with the major reconstruction work that I have done. Does anyone else experience this when using my upgrade packs ?Chris Low.

I'm pretty sure that I did have the same problem when I was using a GeForce 3 Ti 200, so I'm not convinced that faulty video drivers are the source.Chris Low.