Second Update: The 3DS is back on sale at Amazon, with no explanation of how the problem was solved. As you were, then.

First Update: An Amazon representative had this to say on the matter:

“The reason why this is under a review :

The flip-screen is loose when its opened, please inform them that Nintendo has confirmed as long as the upper screen locks into place, the unit is within Nintendo’s design specification. Customers can call 1-800-255-3700.”

Original story continues below.

The US branch of has temporarily discontinued sales of the Cosmo Black 3DS. Some have speculated that this is because of an issue involving the sides of the lower screen scratching the top screen, though unconfirmed statements from forum-goers report that newer models have longer rubber feet on the top screen that solve the problem. Amazon's official statement on the issue is as follows:

While this item is available from other marketplace sellers on this page, it is not currently offered by because customers have told us there may be something wrong with our inventory of the item, the way we are shipping it, or the way it's described here.

We'll provide updates as this story develops and we find out the reason behind the discontinuation. What do you believe to be the cause?