Actually, in a perfect world, only the Blu-Ray edition would exist. KIDDING! :D Jeremy, the green blocking that you're describing sounds like a scratched disc to me. I'd exchange it if I were you.
Thanks for that info! I'm interested in seeing this once (still waiting for a Michael Bay film that I want to re-watch), so it's good to know without having to pre-screen it that it probably isn't appropriate for my pre-schooler (who sleeps with a stuffed "Softimus Prime" :) ).