Today my friend AV showed me what happens sometimes when movies come to America. The question is "Did we ask for such a conversion of the cover, or was it assumed that the original wouldn't sell here?" I think the answer is yes to both.
I'm pretty sure our culture supports such images that we basically did ask for it. But I also think that the US cover will draw more attention and therefor more sales to people who wouldn't normally touch an asian crime drama. I'm not saying either is right, but I am not surprised one bit.