Snap Shots, those popup windows that give a preview of the target page of a link, are to my thinking highly annoying. You can turn the feature off by visiting their FAQ and finding the link that leaves a cookie on your machine to disable the feature on any pages you visit. Unfortunately, if you clear your cookies, you get the blasted preview windows again.
I can never remember where the FAQ link is at, so I am putting it here on my site for future reference.