A handful of differences have come to light since Monday's release of iOS 6.1 not initially disclosed, thanks to reader reports and hands-on testing. One of the most important is the news that Apple has fixed a potentially serious security bug that would turn on JavaScript permanently without the users' awareness or permission in order to display Smart Ad Banners. Other changes include making the "Report a problem" link in Apple's Maps much more prominent, and a subtle change in the lock screen music controls.
