The site is sweetbinks.org. It's an animal rescue site. No iframes, scripts, etc. I know the webmaster and have tried to help them find out why the site is blocked, I have an entire copy of the site(it's not very large) and it's pretty basic html.
I have examined all pages and can find nothing out of the ordinary, no scripts, hidden code, etc. Since the site belongs to a charity, it's a seriouse matter for them to have it blocked. If I load the site on my own server, avast does not detect a thing when I go there so it appears it's the domain name itself that it does not like.