Well now it has stopped, and I noticed the ad all the way at the bottom if this page is now different. If you hover over that ad its a similar link to the one in my image above, with a different id. Now the spinny circle is gone and the tab shows the tgc icon.
Maybe Rich saw this and did something? Odd, but good.
Regarding ie7: Yeah, I have seen it for a while now in updates and have ignored it. I was interested in the tabbed browser but not enough so to get one of the alternatives. I finally decided to make a restore point and try out 7. With how embedded the browser is in MS OS's I am always leary of blindly updating to new versions. Sorry it crashed on you. I havent had any issues yet (luckily) and I am diggin' the tabs. Much more organized than having 20 windows open.