Two days ago it was discovered that it takes just a few strings to crash chrome. After playing around a bit with the malicious string, which is the URL http://a/%%30%30, I found out that by adding that URL as the image in your profile on a SimplePortal bulletin board will crash every page on which I had left a comment. Simply add the following to your profile signature.
This is enough so that the tab of anyone who clicks on a post in which you have left a comment crashes. I did report this to SimplePortal, though I am assuming they will just wait for a fix in the chromium engine.
If you want to try it out yourself without crashing your entire browser, hover over the URL here.