I'm pretty sure that's not how you are supposed to call the users endpoint.  Try this:

[`http://api.stackoverflow.com/0.8/users/23234`](http://api.stackoverflow.com/0.8/users/23234)

You aren't supposed to pass id in as a url parameter.  It is actually part of the url.

Your call is being interpreted as:

[`http://api.stackoverflow.com/0.8/users`](http://api.stackoverflow.com/0.8/users)