Onion skin layers do not appear in correct state when zooming out
Gray rectangles appear on screen when showing onion skin layers
If your onion skin layers are not appearing correctly when zooming, select either the Pan, Zoom or Totate tools in the toolbar and disable Area Averaging and/or High Quality Display to remove artifacts.
The number of onion skin layers are selectable when you start a new movie, to turn them on choose Movie > Show Onion Skin Layers
Note: Engineering is currently reviewing this issue