I'm at work right now (on my 15), so I can't compare mine to the ones at the Apple Retail Store, but, when my 3GS is on hold/sleep, I can still see the border of the springboard on the screen. Is it supposed to be there? This is the first time I've noticed it and I can't recall if it was ever just a black screen or if the border was always there. Do you mind checking yours and telling me if you get it too? Thanks!