The Wii U and 3DS both have recent updates. Hit the link to get the details on the 3DS firmware update.
This brings the Firmware on the 3DS up to Version 4.5.0 – 10U. The update brings “further improvements to overall system stability” and “other minor adjustments” to “enhance the user experience.
Go out there and download the new firmware. Unlike the Wii U firmware update, this one is small so it shouldn’t take you too long.