Bringing this slightly back to topic:
My copy has subtle vertical lines. I know enough to know that this is a digital compression issue, but what's the deal? Why isn't the compression rate (or whatever you call it) better? There is also something about it -- it's flatter, more... digital looking. I wish I could put my finger on it exactly; it's analogous to the difference between film and video. It's particularly evident in rapid motion, like someone jerking an arm up... again, hard to describe. I started to notice when NBC digitized its signal (?) because the tennis balls got funky during Wimbledon.
And don't get me started on digital Simpsons versus hand-drawn Simpsons.
The compression thing is the most troubling -- it's like there's a scum on the screen.