304:://not-modified

Twitter Encountered error for response:[<ABHTTPRequest: 0x1e088e00>]
URL:[https://api.twitter.com/1/account/push_destinations.json]
error:[Error Domain=com.atebits.httprequest Code=304 "not modified" UserInfo=0x1e180e80 {NSLocalizedDescription=not modified}]
data:[(null)]
headers:[{
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    "Content-Length" = 0;
    Date = "Thu, 25 Apr 2013 14:03:51 GMT";
    Expires = "Tue, 31 Mar 1981 05:00:00 GMT";
    Server = tfe;
    "Set-Cookie" = "dnt=; domain=.twitter.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT, lang=en; path=/, lang=en; path=/, lang=en; path=/, twid=u%3D546793724%7Ce2mTZWvz6BFh1QAXGdYAWrKhn4k%3D; domain=.twitter.com; path=/; secure, _twitter_sess=BAh7CDoPY3JlYXRlZF9hdGwrCBTjgUE%252BAToMY3NyZl9pZCIlZDBmOTJiODAx%250AM2NjOTk3ZDhkNDA4NDY5NmM2YTA2OTE6B2lkIiU5MDU1MTU4Y2Y2YzcwNmQ4%250AODEzZmNkMWVkZmU5NDNkNQ%253D%253D--e39cfc7d8ea9faa7605ba1ffb1e2d16ff2f1a332; domain=.twitter.com; path=/; HttpOnly, guest_id=v1%3A136689863130165831; Domain=.twitter.com; Path=/; Expires=Sat, 25-Apr-2015 14:03:51 UTC";
    "Strict-Transport-Security" = "max-age=631138519";
    Vary = "Accept-Encoding";
}]