Try setting your browser to not accept third-party cookies — it could be something like doubleclick. Many people consider McAfee & Norton to be nagware and problems in and of themselves.
No idea what possible harmful content there could be. I just ran a Vaultpress security scan which looks for dangerous files and codes and everything came back clean. I also run 2 anti-spam plugins – Akismet and Anti-Splog from WPMU. In addition, I personally scan members activity posts to see if something slips through and I don’t see anything to be concerned about. The only content is the radio channel scripts and 2 autoblog feeds from Elephant Journal and Huffington Post. There is Google Analytics code but that is pretty standard.
If you could run the Mcafee scan again and give me something more specific, I would appreciate it but I really don’t believe there is any harmful content on this site. I make every effort to prevent it.
