FYI...

Cache objects history enumeration weakness...
I.E.: https://secunia.com/advisories/47129/
Chrome: https://secunia.com/advisories/47127/
Firefox: https://secunia.com/advisories/47090/
Opera: https://secunia.com/advisories/47128/
Release Date: 2011-12-06
Solution Status: Unpatched...
"... caused due to an error when handling cache objects and can be exploited to enumerate visited sites..."