If you get an alert notifying you of a potential virus or malware on the forum, the issue has been resolved. It's generating from an etsy image someone posted, but has been resolved by etsy.
This is the note I received from the forum host:
"It sounds like someone linked an image or a file from etsync.com, which Google has flagged as having found to have had malware in the past. Then it was scanned by the googlebot, flagged, and that caused the warning to show up for you (or others potentially).
My guess is that since it's not showing up now, they've re-scanned and not detected it.