Andrew Cunningham at Ars Technica:
Apple has just released iOS 7.1, the first major update to iOS 7. The new update provides a variety of security and stability fixes, some speed improvements, and UI tweaks that refine the new design introduced back in December. The update is available for all devices that can run iOS 7: the iPhone 4, 4S, 5, 5C, and 5S; the iPad 2, both Retina iPads, both iPad minis, and the iPad Air; and the fifth-generation iPod touch.
Fire up the Software Updater again, here comes the big one.