@demonicben: I don't believe this is a scam. "Reading your browser history" sounds bad, but it has to read your browser history in order to display the images your previewing. Just because it's reading your history, doesn't mean it's doing anything else with it, like sharing it with anyone or anything. And if it's not displaying the images properly, first make sure you have installed the Opera extension that the developer says that this extension requires you to have for it to work (LinkRedirector). It's free and doesn't require any setup. If it still isn't displaying images on hover, the default options require you to hold control while hovering over a link. You can disable ctrl hold in the options for ImagePreviewer.
