What she said.
I think some people go overboard on the spoiler issue only because they go overboard on just about everything else. Its their nature to find something to bitch about (and Im not referring to you Patrick!). Having said that, I think this image on the front of the case is a little bit TOO much of a spoiler and the forum title for W&G that Bob mentioned is also far beyond a mere hint and seems to have been used for the specific purpose of ruining the book for those you hadnt read it.