Ok, I too finally received the malware message in Google Chrome. That's a shame because the AB Testing site is not bad. I've put the domain through a couple of scanners and they all report the site is clean.

http://sitecheck.sucuri.net/results/wp-abtesting.com

I suppose the domain has a bad history previous to the two months they have owned the domain. Any of you folks know how they could remove that message?