FFCP acceleration causes bulges on faces

[3dmaker]

Hello, I have a FFCP and using S3D for a slicer.
For a while on my every print bulges appear on flat faces because of acceleration.

https://drive.google.com/file/d/0B0wGAQ ... sp=sharing
The left one is without accel and right one with accel. I can't print without accel because it will take forever.

How can I fix this?

[CompoundCarl]

Those are pretty tiny bulges, so it's hard to tell. It could just be hardware vibrations from the quick movements. Those could easily cause defects that big.

Also possible that it's a firmware issue. Again, hard to be sure at such a small scale.