Apple iOS 7.1 beta adds UI tweaks, including dark keyboard setting

Apple has just released iOS 7 to registered developers. While still incremental, it's got a few noticeable feature updates yet for the young OS. Related postsThe continuing evolution of iOSThe killer iOS 7 feature the iPad needs: Touch-pad supportRumor has it that Apple's iOS 7 development is delayedThe update, currently in beta, includes some bug fixes and user interface tweaks. For example, users can now toggle back and forth between a light and dark colored keyboard, better for use in dark settings. The update also lets iPhone 5S users upload "burst mode" photos -- taken in rapid fire by holding down the shutter button -- into the photo stream.Another feature that helps customize the experience is the ability to reduce the transparency effect. Apple had just recently released another minor update to the OS. Last week, the company came out with iOS 7.0.4, which fixed an issue related to FaceTime failing.