@ vae victis: It is a great zombie movie! I also have that rip, its not very good. What I would REALLY love would be an NTSC DVDshrink, but I don't want to ask a lot. I'll probably buy anew one, to get the extras.
@spud: I think you are right. There are no scratches or scuffs, or even dust/smudges. It seems pristine, but very close inspection reveals, the outer edge (about 4-5mm from the edge) shows what is almost scuff-like, but underneath (breath covers it). That must be the rot. (Some kind of zombie special feature maybe!) No sign of tiny holes, though.
I probably buy a new one someday. Maybe Synapse will get to me. Not sure if that counts as defective.
Thanks for the help guys.