hi everyone.
i'm hoping you can help me, as i think i have a problem

.
i purchased blade runner blu ray 5 disc collection on november 28th of last year from amazon.com (i live in australia)
interestingly enough, i only just watched it today and i was extremely shocked by the picture quality (after hearing such good comments on it). i am referring to disc 1 which is the final cut (unless i'm mistaken).
i'm not sure if anyone has heard of this problem, but i will try and describe it. throughout the movie there is a horizontal thick green line (in darkly lit scenes) uhh, semi transparent, sort of like a lens flare or something? but it comes around extremely often, not to mention the overall quality is just not good.
after i finished the movie i wasn't completely sure it was a problem or just the look of the film (i haven't seen it before) but i put in disc 3 and played the theatrical cut for a bit, and the pq looked so much better, there wasn't any of the *green flares* that were on disc 1, it was a lot less grainy, more sharp and better all round. is disc 1 supposed to look like this (quite simply i would say it just looks grubby)? or is it possible i got a dud? i apologise if i'm being naive since i haven't seen this before, but there was a very big difference between the different versions in terms of quality..
thanks!