Amazon Mixx Up
One of our readers sent in this interesting link. In case teh error is corrected by the time you read this, the page is Amazon.com's listing of volume one of Clover by Clamp, however the picture featured is a picture from what would appear to be a North American release of Kare Kano.
Clover is published in North America by Mixx Entertainment and appears in their monthly Smile Magazine (reviewed here). Mixx had the North American rights to the Kare Kano Manga (The Anime will be released by Right Stuf) but they lost them a few months ago for undisclosed reasons.
I'm guessing that Mixx accidently provided Amazon with the wrong image, that picture was probably from a sample Kare Kano issue that Mixx did.