Every MacBook Pro I've seen (including every single one of the ELEVEN I've owned in the last year---thanks for such great quality control, Apple!) has some backlight bleed (of greatly varying width and brightness) at the bottom of the screen. It is much less noticeable on some than on others, and it can range anywhere from a millimeter wide to a couple of inches. On some, it's just the lower corners of the screen, while on most it seems to be a band running the entire width of the screen on bottom. Even my current 17" SR, which I would classify as "perfect", isn't really perfect in this regard. In fact, if you look really (and I mean REALLY) closely, this one has TWO bands, both very thin, one right above the other and separated by a very thin darker band.
I guess the reason this doesn't bother me this time around is that it's not at all visible except on a completely white background, and even then it's hard to see if you're not looking for it. Even on black backgrounds (surprisingly), such as when watching a DVD, it's not visible. But I've had some units that bled through the entire bottom third of the screen.