On Tue, Jun 16, 2009 at 1:05 PM, Stuart<stut...@gmail.com> wrote: > > It's optional in the HTTP spec, but mandatory for the Twitter Search > API. I don't see a problem with that.
Erm, for sites like TweetGrid, TweetChat, etc, which are all browser-based client-side driven sites, the users' browser will make the request. In this case the HTTP Referrer can be (and often is) unset. The user-agent, however, is usually set for all browsers, but sometimes people use plugins to mask or delete that, even. Just and FYI that not all of us have control over this. -Chad
