I still get the warning too. Also, when I'm using my Droid, I can only view these pages in potrait mode. The screen won't turn when I turn the phone to landscape mode. None of the other forums I visit are responding like this one.
What forum software are the other sites running? I'm using the latest version of VBulletin 4. It is my understanding that VB5 is a buggy piece of crap.
If somebody can find exactly WHAT McAfee is grumbling about, that would be very helpful. I'm guessing it's an ad of some sort. My ads are served by Google and while they usually vet them pretty well, occasionally one of the ads will link to a dodgy site, which may trigger the warnings. If I can find out the ad that causing it, I can block that advertiser.