I've heard quite a bit about people missing various pieces of packaging from the CE. For me, I was missing my activation code, which made me unable to play the game. Whether or not anyone else had an issue, physically take it back to them. Talk to a manager. If that doesn't work, ask that the district manager be contacted. I'm sure they'll relent, as they sold you a product missing portions of it, and they are obligated to replace them.
Gamestop actually told me to come here and post it up. They claim NO ONE else has had an issue. Obviously it is some packaging house deep in some Chinese mountain village, none of whom give a rats ass if these boxes go out correctly. So I am thinking about just doing a charge back...