This maybe obvious to many, but thought I'd just add this to the forum. The "Top Sites" functionality within IE and Safari, of the browser presenting a series of sub-windows based upon recent and common websites visited, will regularly update content from each site. Which is great for the person using the browser as it provides an updated view of the world.

From a site owners perspective and those looking at the web analytics, it does mean visit numbers will increase should your site feature within the top sites of a user's browser. Some may have experienced an increase in repeat visits, and this maybe one reason for this. Unfortunately, as the sub-window only pings the homepage, packages like Google Analytics will see this as a bounce, meaning your bounce rate percentage count may have increased as well. Other operating systems, such as Chrome may do the same, but yet to be confirmed. Has anyone else any experience of this? 

It's no biggy, but something to be aware of.