Page 1 of Iron Giant problems on Hitachi 505

I just bought Iron Giant and am alarmed at the very poor picure in some of the dark/low contrast scenes. The colour are severely pixelated resulting in a huge loss of detail. Crap/faulty disc or crap/faulty player?

I just had to return my 505 as i had the same problem with sixth sense and matrix and a few other discs.Hitachi have had a bad batch of decoder cards or something. Ironduke has a 505 and loves it his has no problems but unfortunately mine was one of the dodgy batch.