Why is it, and this is repeatable every time, that when I log on to this site, click the GalCiv2 logo at the top to take me to the forums page,

Why is it that my CPU usage jumps to around 50%, maxxing out one of my CPU's? And it remains there even if I close the browser.
It acts like this with no other site than this one, and it is getting really, REALLY irritating.

I have delete the temp internet files and reboot to get it back to nornal.