I got the virus warning the other Day when I went to 3d Sara Creations. There is a post about it at Daz. I believe they may have been hacked. Before closing the AV Warning I opened the page source. The first line was a call to a random named javascript file. After I was sure Norton deleted the virus. I went back to 3D Sara to check it again. No warning and when I viewed the source, the line calling the js file was gone. So it looks like it is being inserted dynamically either at random or by your first visit. Someone in the Daz forums was going to contact the site owner, but that was several days ago.