Apple has released the third beta version of iOS 4.3 to its paid developers. Listed as build number 8F5166b, it is unclear what has changed in the new version from prior betas, which included the new Personal Hotspot Wi-Fi sharing feature and enhanced AirPlay support for Safari and third-party apps. In addition, the release is once again accompanied by a new preview build of Apple TV Software 4.3. Separate versions of iOS 4.3 beta 2 for the iPad,…