We received notification from Google a few hours ago that some malware had been injected into some of our forum pages, leading to a warning being displayed whenever SFN is listed in Google search results.
Both myself and Capn have investigated this issue and have found no evidence of this so far -- it may be the result of an IP.Board vulnerability that we have just patched. Additionally, we have checked servers and done our best to ensure the site is safe.
The issue has been bounced back to Google, and hopefully this should be resolved within the next few hours or days. I will post again once we have received an update.