Apple has released iOS update 7.1.1.
The update, which is the first minor update to iOS 7.1 (which itself was only released March 10, 2014), patches a number of issues, including Touch ID recognition, keyboard responsiveness, and problems with Bluetooth keyboards when VoiceOver is activated.
This is the second time that Apple has issued a patch for the Touch ID fingerprint recognition issue. iOS 7.1 also attempted to fix the "fade" issue that some users have been reporting.
iOS 7.1.1 is compatible with every iOS 7.1 device, which means that the iPhone 4, 4S, 5, 5C, and 5S, the iPad 2, 3, 4, and Air, both iPad minis, and the fifth-generation iPod touch.