Looks like I'm the only one with a broken forum.
Your browser is "broken" not the forum.
Clear the cache (manually if you have to), reinstall or install new version after you clear the cache.
Try different browsers. Intardnet Exploder, Shitzilla Shitfox, Rust or Opera.
If it returns on other browsers, reinstall Windows (preferably with deep formatting the hard drive, that will clear you from all but the most devious viruses).