I don't see it when I view source.
Looks like a couple of your ads could be the culprit. Don't know for sure.
AdYea according to McAfee
http://www.siteadvisor.com/sites/adyea.com
PussyGreen according to WebOfTrust
http://www.mywot.com/en/scorecard/pussygreen.com
PussyGreen.com according to McAfee
http://www.siteadvisor.com/sites/pussygreen.com
Good luck
