Go to http://www.facebook.com/about/timeline and click "sign me up" at the bottom right
This is perhaps irrelevant to the topic, but it's really frustrating that there's basically no way for me to do anything about this. I've waded through their highly unhelpful help pages to submit bug reports for all the things I've found not to work, but this has been the case for months.
I assume that I managed to be a part of an A/B test that causes some really inoperable things to happen? Regardless, it sort of reinforces my negative opinions of Facebook engineering when something can consistently break for me to the point that it renders no page.