ther 
they put your site in their favourites (or bookmarks) or not. Apparently the Mac 
OS X browser, Safari, also loads the favicon.ico file whenever it visits a site 
(it uses it in the history menu). I've not checked the latest version of IE so 
I'm not sure if it does the same too. I merely mention this "side-effect" so 
that you won't deceive yourself when you see the large number of "favicon.ico" 
requests in your web logs: it doesn't tell you that those your visitors 
bookmarked your site anymore. </