holy crap, I was just looking at my phone today and noticed this as well (I noticed it this morning before I read the thread, not the other way around lol). But ya... only had it for a few days and I see some spots where the coating is coming off I think. If I run my fingernail over them I can feel a very very slight roughness... I'm quite unimpressed with this, as my Vibrant has been dropped many times and the screen has held up fine.
I'll try cleaning it a bit (I never use anything other than a microfiber cloth) and see if it helps out... if not maybe I'll exchange if more problems come up.