OK... this is a weird one. It seems that one or two of my game carts are just slightly wider than others. This causes the memory card / audio board tray under the control panel to hit the cart and prevents it from fully closing. However, try as I might I can not spot the difference (and my caliper doesn't go that big). There is a strong possibility that the cart cases are third party. Shown in the images are a 100% real cart, a bootleg and one of the carts having this issue. Also shown the inside of the cabinet where you can see the aforementioned tray. Anyone encountered this before? It's a problem, but I don't know that it's worth the cost of a replacement case and label to address it...