Along with all of the goodies that Nintendo revealed last week on their stream of Nintendo Direct, it has been announced that Mario Kart 7 will be receiving a patch sometime this May.
According to Satoru Shibata of Nintendo of Europe, Mario Kart 7 will receive a patch that will have some gameplay tweaks and a fix to an online exploit in the Wuhu Mountain Loop track. Expect the patch to be pushed into your Nintendo 3DS sometime this May.