With T5498 it will be impossible to interact with surfaces in a 3D view using mitkAffineInteractor or mitkSurfaceInteractor.
Mathias once implemented mitkAffineInteractor3D to be used for surfaceinteraction in 3D.
A nice solution would be to merge both Interactors or tell the AffineInteractor to propagate the Event to mitkAffineInteractor3D if necessary.