Fortigate have recently released an AV update on their Fortinet which blocks websites with the following error

http://fortiguard.com/search?type=av&q=HTML%252FScrInject.B%2521tr

A few malware checks on the website shows there are no virus of malware on this site

A Support case with Fortigate there was an error in their AV database and they released an update 2 hours later