0.9.3 -> 0.9.8 What happened to Accelerate Relative to: Scene ?

Jel

I've gone back to an old(ish) project that I finished in GS 0.9.3 and opened it in 0.9.82 but Accelerate Relative to Scene seems to be messed up. For the last year I have used the Accelerate behaviour instead of Gravity as it has alway given more options and more constancy in GS but now my actor floats all over the scene and not downward like before.

Sorry if this has been talked about before but I must have missed something along the update way.