Fix: passing a callback parameter will no longer result in a 200
response code, as it was breaking some applications. Please use
suppress_response_codes=true if you need this behavior.
Fix: whitelisting approval emails now contain the IP addresses we
approved, not just the usernames.
Please also note this pending change to the response body of
/friendships/exists, shipping January 2, 2009:
http://code.google.com/p/twitter-api/issues/detail?id=202
--
Alex Payne - API Lead, Twitter, Inc.
http://twitter.com/al3x