Well, if you really want to have a body without the "light leak" issue, I guess you will have to wait a while until Canon clears the "defective" inventory. If you only want the body, wait even longer, because Canon wants you to buy their 24-105 lens. I am not sure if they will do anything to fix the problem even if you send yours in. To get to the part b/t the LCD panel and the AE sensor, Canon will have to open your camera up. Who knows what else they will mess up when they do that.
We, the loyal first adopters, will just have to swallow this and pretend nothing has happened. If this bothers you, send it back to your dealer. If not, go take photos and stop coming back to this forum.