REVscene Automotive Forum - Chrome/Google warning

there's an ad in the Photo Lab at the top of the page for Whitebox Studios. it's giving my browser a warning about malicious script/malware etc..

Quote:

Site is listed as suspicious - visiting this web site may harm your computer.

Part of this site was listed for suspicious activity 24 time(s) over the past 90 days.

Of the 23 pages we tested on the site over the past 90 days, 21 page(s) resulted in malicious software being downloaded and installed without user consent. The last time Google visited this site was on 2012-12-02, and the last time suspicious content was found on this site was on 2012-12-02.
Malicious software includes 27 scripting exploit(s).