Re: Like a moth to a light
El Reg won't let me post the quoted html from crashsafari.com here, but somebody has already done so at pastebin. I don't know whether the Google Analytics thing is the culprit within the javascript, or the huge loop shoving stuff into the browser history. Probably the latter.
Edit: explanation here[github.com], including why it crashes not only Safari.
Second Edit
Who the hell thought this was a good idea?
HTML5 introduced the history.pushState() and history.replaceState() methods, which allow you to add and modify history entries, respectively.