The Safari browser in iOS 6 has a flaw in its handling of JavaScript that, while not presenting any serious problems thus far, could evolve into a potentially security and privacy issue if not corrected soon, reports AppleInsider. Users who have turned JavaScript off for security or other reasons on their iOS device will see it turned back on — without notification — if the user visits any site that uses Smart App Banners, a feature of iOS 6 that requires JavaScript to work. The flaw has so far been found in all builds and versions of iOS 6, including the in-testing v6.1 beta, though Apple h…