Major news stories like the Royal Wedding are often used to trick users into selecting links that will automatically download malware.  Please be careful on anything you select.

President Obama Birth Certificate and FAKEAV attacks
http://sunbeltblog.blogspot.com/2011/04/obama-birth-certificates-and-rogue-av.html

QUOTE: You probably saw that whole “Obama birth certificate” thing yesterday. You’re also aware this means hunting around for pictures of his birth certificate is going to result in Rogue AV files popping up. Big news stories will always result in a wave of Rogue AV in both regular search and image links, so be careful where you click (as much as you possibly can, at any rate).