Why does this happen in Chrome?

http://i.imgur.com/Elxme3f.png

I clicked a link on the HN homepage, then Businessweek seemed to have redirected to itself 6 times. Now I can't use my back button to come back here unless I hit back 6 times very fast, or hold down back and select HN. Lots of websites do this.

Disabling Adblockplus on Chrome fixes the issue, but I don't want to see ads or disable the blocker all the time.