Just now I, tweeted on Twitter from the web. I seen two URLs in my tweet, one, which I added and another one is automatically added. The second URL is a short URL of the status of the same tweet. The short URL is from friendfeed’s ff.im. Why is this status URL appeared in the same tweet?

Is it a bug or something else. I am facing some problems while using Twitter on web. Some times its asking user name and password, which we seen the screen same as web directory login ( .htaccess ). Checkout these Mr. Tweet.