A list of changes can be found here: http://www.macrumors.com/2013/07/29/...earch-options/
---------- Post added 29-07-2013 at 07:55 PM ----------
Beta 4 also contains some code which could be used as evidence to suggest that the next iPhone will, as has been rumoured, include a fingerprint sensor in the home button.
http://www.macrumors.com/2013/07/29/...for-iphone-5s/