I'm not sure why you would be experiencing this, or how it would be directly related to 3D. Are you using the 3D glasses for live broadcasts and gaming?
Or is the ghosting part of the 2D signal? If the image looks "watery", I might suggest adjusting the AutoMotion Plus to "LOW" or "OFF" and see if that might help.
I've had my Samsung 3D LED 40" Series 7 television for a week now, and I've noticed on all 3D content (Fifa World Cup, Australian Rugby, PS3 games) that I get quite a bit of crosstalk/ghosting. I've read about this been an issue for all the Samsung 3D LED TVs and that the problem doesn't exist on other brands or Plasma models.
Is Samsung going to fix this? Or is it a hardware problem and thus my 3D TV is not worth watching 3D on and won't ever get fixed?