
Looking at your site's source code, the site used to host the 'Previous' 'List' 'Random' 'Join' and 'Next' buttons was found to be hosting suspicious stuff in the past 90 days. Google tested 71 pages on that particular host and one of them was found to be hosting malware that would infect people's computers.
The best way to stop this happening is to take the buttons off your site, or simply right click and save them, and then upload them yourself manually. Although it is probably not a problem what so ever, the image's webhost has been identified as malware and those with more sensitive browser settings will be getting this message and potentially stopping them viewing your site!
From the diagnostics page, it seems that the stuff hosted on lycos, was using content from another host that has malware on it and that is why it's being flagged up. Annoying but I'd rather be safe than sorry.