This is an issue that has been reported (though reports have been few and far between) since Apple launched iOS 6 a few months back. The bug is still present in the beta of iOS 6.1, as has been announced by several developers who have access to the software.
However, although there has been a bit of an uproar about this across the world of Apple fans, Lysa Myers from Intego – a security firm – reckons that this particular bug shouldn’t be a big worry for iOS 6 users:
Although the issue may not be a great threat, Electronic Frontier Foundation’s Peter Eckersley has this advice for any users of Safari on iOS:
“At this point, our advice for browsing the mobile web in private is: Don’t do it, (…)If you need privacy while you browse, use a desktop browser.”
Via: Apple Insider