New Twitter UI was launched recently. Some can use it already, others can't. By the way, I realized an interesting fact. When I visit twitter.com from favstar.fm, I can always see the new UI. But on the other hand, when I visit there by typing "twitter.com" into Chrome's omnibox, all I can see is just the previous UI.
I think some information in HTTP header does this trick because URL is the same between when typing by myself and when jumping from favstar.fm but Referer.
But I'm so unfamiliar with web technology that I can't survey by myself.
Would somebody tell me why this happen, or how they detect and provide different UI to each case? Is the server to be connected different? And it's differed by the Referer?