Just having an IE 8 window open on some Web sites uses 90% + CPU cycles. On this site, as soon as I clicked on the Internet Explorer Topic, IE started using all my CPU. Once I clicked to post, the useage dropped to 1 - 2%. Yahoo pages do it and so do TechRepublic pages. I used Wireshark to look at the packet flow, and not much was happening between me and the sites that were eating my cycles. (I suspected it would be a stream of ads, but it didn't look like that was happening)
Does anyone have any idea what is happening or how I could fix it? Process Explorer doesn't show any child processes under the iexplore.exe that is using the cycles.