It should also be noted that the same "malware" warning appears to be showing up on TES Nexus at the moment, as well.
Since I use an adblocker I must ask...do they have advertisemants on these websites? I'm betting that's the culprit. Quantserve ad service is the absolute worst regarding trojans and viruses in ads. There were enormous issues with this on DeviantArt and Dragon Cave a while back.
If you're on Firefox: Get the NoScript and Adblock Plus addons.
If you're on anything else: search for an ad blocker for your particular browser.
READ THE INSTRUCTIONS. I'm not tech support, and if I have to be I'll start charging money.
Should help, though.