The effect seems to break a bit when an object has its transparency manipulated - is it rendering the alpha properly? When applied to a layer, the edges of objects (sprites, Paster objects, etc.) show up, even though they're either 1) fully transparent or 2) solid black with their blend mode set to additive, which should render as transparent.
1, Can you post an 'picture or image' of the problem?
2, Are you using the effect on a Sprite or on a Layer?
Sorry for late reply.