"Sites around the web are getting splashed with a mysterious dialog Tuesday, thanks to a change in the way Twitter handles user authentication. Some Wired.com website visitors see the dialog box shown here when visiting any of this site’s blogs. It states that a username and password are being requested by Twitter, with the unhelpful message, “Twitter API.” The same dialog has been spotted on ReadWriteWeb and even on Twitter’s own website. In addition, users of some Twitter apps, including Twitter’s own Tweetie and BlackBerry apps, Tweetdeck and Twitterrific, have complained of Twitter login problems. In the case of the website dialog, entering your username and password doesn’t do anything useful, and won’t make the dialog box go away. Indeed, it will often reappear several times during a sessio" - Miguel Caetano from Bookmarklet