Alrighty sorry for this guys, I came on and changed this as soon as I can, the error you were experiencing is a Malware warning by Google Chrome's Inbuilt security feature. It was trigged by a member's avatar being linked to a site that has recently been diagnosed of spreading and distributing malware.
The user's avatar has been removed and more measures are going to be put in place to stop an event like this happening again, also next time please post in feedback and suggestions, would of seen this post earlier to reply to it.