Yesterday, Apple seeded developers with iOS 7.1 beta 3.
The latest beta comes after the December 13th release of iOS 7.1. beta 2. It includes a number of bug fixes and visual tweaks aimed at improving usability.
Via Twitter, @Sentry_NC has created an image which shows the evolution in user interface elements from iOS 7.1 (Beta 1) to iOS 7.1 (Beta 3):
Source:
https://twitter.com/Sentry_NC/status/420772731987034113/photo/1