And here's another possible clue, but I don't know if this is meaningful or not. My 10-21-2008 Jasper has a slightly different sticker on the side panel of the box. It says "XBOX360 ARCADE SYSTEM VALUE BUNDLE 2008 E".
The Falcon I'm returning says "XBOX360 ARCADE CNSL BNDLE EN/ES US HDWR NT".
The Falcon I'm returning says "XBOX360 ARCADE CNSL BNDLE EN/ES US HDWR NT".