I haven't seen anything wrong with the forum or experienced any malware from it. Any thoughts?

I've had a similar message once in the past and I think for me it was because of a link in the text advert panel which was suspected of being malicious.

Try load your forum again and see if the message appears. If it does, it could mean someone has posted a link someone that could be malicious. Or it could just be Chrome over-reacting but don't take any chances, you should check anyway to be on the safe side.

Hello,

Did you install any new smiles, JavaScript or anything recently? These three examples are the top reasons as to why this message would show.

I haven't installed anything on it in awhile.

Hi, go (on your web browser) to the Wrench icon // Options // Under the hood // and un-check 'Enable phishing and malware protection' then it will load fine.

You sure? How about users who post images?

Thanks for the help. Turned out to be one of my thread icons came from an infected host. Easy fix once you find it...