IE favorites icons

IE (v7 at least) stores icons for sites in the favorites menu. I do not know whether or not IE also stores icons for sites visited but not in favorites. These icons do not seem to get wiped with the CCleaner process. Therefore if someone / some program were able to access these icons, it could be evident what sites had been visited and/or stored in the favorites folder. If CCleaner were able to wipe these icons that would bring about added privacy.

I don't know where in the registry or wherever these icons are stored, but from what I can tell from reading through some of the forums, there are plenty of people who will know or can find this out.

Many thanks in advance.