...more specifically, certain parts of TW. Soon we're going to require that you use a more modern browser to navigate some areas of the site. This will allow us to update areas without breaking our backs to maintain compatibility with outdated web browsers. You must be using a recent version of Chrome, Firefox, Opera, Safari or Internet Explorer. If you're going to use Internet Explorer, it must be version 8.0 or higher (7.0 and below will no longer be able to access certain areas of the site)
If you don't know what browser version you have, this will tell you: http://fmbip.com/
I won't disclose what sections will require a non-ancient browser, but when you run into it, you'll be notified.