Jon, I am getting a Trojan alert to something called IFramer when I open just about any page. I'm using Kaspersky Internet Security 2010. It says something about .../forums/clientscript/vbulletin_ajax.js? Sorry I can't be more specific, but the alerting message cuts off the complete path.
BTW, my KIS2010 is updated as of last night. However, the problem started last week. I posted elsewhere, but now that I found this thread you started, I figured you might get an alert when someone replied.
Best wishes for a prosperous new year!
Richard