Earlier today, Apple released iOS 6.1.3, a security and maintenance update of iPhone, iPad, and iPod touch.
iOS 6.1.3 fixes the lock screen bug that was introduced in an earlier version of iOS 6. The update also includes minor fixes and updates for the Japanese version of Maps.
You might recall that iOS 6.1.3 started out life as iOS 6.1.1 back on February 6th. A number of serious bugs where discovered in iOS 6.1, 6.1.1, and 6.1.2, forcing the originally planned iOS 6.1.1 to become 6.1.3.
iOS 6.1.3 is available now for current model iPhone, iPad, and iPod touch models. To upgrade your device OTA, go to: Settings > General > Software Update.
Apple has also released Apple TV 5.2.1 update for second and third generation Apple TVs.