they say it is an image processing artefact.<p><a href="http://www.youtube.com/watch?feature=player_embedded&v=6X96xI1gLdQ#t=57s" rel="nofollow">http://www.youtube.com/watch?feature=player_embedded&v=6...</a><p>After having already watched 6.5 seasons of TNG on Netflix i believe them that it isn't a cloaked Klingon warbird (because the warbird is smaller that the ship in the image :)