Hmmm, so does this all mean that the Amazon rep was just talking out of his butt when he verified that the set was the newly corrected one? I hope I'm not just going to be receiving another copy of the flawed discs on Tuesday.
If it's new, the barcode should be different. And look for a red delta on the spine that the UK press release spoke about... I would think the US one would have that as well.
If there's no visible difference, don't bother opening it. Call them and ask why it's an identical-looking set first.