Update: Kmart.com stopped the promotion, citing an error in the company's computer system that has since been fixed. Sorry folks!

In our never-ending quest to acquire all Microsoft Avatar clothing and props, we relish the moments when Microsoft Point cards are discounted in real-life money. This is one of those moments, with Kmart.com giving 20 percent off of "select game accessories" -- including 4000 MS Point cards.

To be extra clear, that's $50 in points for $40. As SlickDeals.net points out, though, the discount doesn't apply until you've added the card to your virtual basket, and you must enter "KMGIFTS" for free shipping -- "YOGIMMETHISFORFREE" does not work.

This article was originally published on Joystiq.

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