A pet peeve I must comment on. Cobb using Mal's totem. They say that you must select a totem so that no one else in the world knows the exact feel and weight of. Cobb adopts the top as a constant reminder of his mistake, and no one knows it's true properties, except a dead woman. "But wait, what about when she shows up in the dream world?" If she knew in the dream world then so would every figment in every brain, making the totem's useless. As the totem's are not useless it is safe to assume that the figments don't have that knowledge, or can't effectively use it. My take on the (non) issue.