I just bought a denon dvd-1910 and I have noticed that sometimes the blacks almost look purple. I dont know if thats a very good description or not but im not sure how to explain it. I noticed this in some of the night time scenes in national treasure. I've tried 1080i,720p,and 480p over dvi and havent noticed much difference. I dont have an avia calibration disc, but is there something I can do to fix the problem?