I've found that it's a trojan affecting the host: Trojan:JS/Blacole.Ref.CZ. According to Microsoft, Trojan:JS/BlacoleRef.CZ is a detection name for an obfuscated JavaScript, often found inserted into compromised websites. This threat is designed to load a hidden IFrame that loads behind the user's browser, redirecting it to an exploit server known as "Blackhole."
I get this threat when accessing this site on IE 10 no matter what setting I use (private browsing mode on or off). However, I'm safe on Firefox 22 when I have the Private Browsing mode activated. It's another reason why Firefox is still the best web browser, so please try using it for now to stay safe. Also, make sure your virus protection is up to date as it's a rather new threat, and turn your Java security settings up to high.