Facebook appending #_=_ to the redirect url

When I am trying to connect using the Facebook Connect 开发者_开发问答SDK for PHP, #_=_ is appended to the URL. As a result of this, subsequent calls to facebook don't work. How to take care of this.

Does any one have an answer to question?

This fragment is to do with your redirect_uri and you need to make your app be able to handle it. See here https://developers.facebook.com/blog/post/552/