Tom's Hardware Homepage - High CPU useage

Hello.

When I am on Tom's Hardware Homepage, I see high CPU usage (~15%) for the FF browser.

Main PC: Win 7 x64, Firefox 9, Athlon II X4 620 (no OC, under-volted).
FF addons: NoScript, AdBlock Plus, NoSquint. (disabled does not help)

I see high CPU usage when I am viewing the "Forum Live Feed section".

I have found any of the following significantly reduces FF CPU usage:
- Scroll down to the bottom of the page.
- Switch tabs, or click a link so Tom's Homepage is not the "Active" tab.
- Minimize the browser window.

I haven't seen this high CPU usage behavior on any other Web Site, or other Tom's Web Pages.

Can anyone else check to see if they get similar results?

Thanks, David