i had the same problem, i use the 140dev streaming api PHP application.
I solved it by upgrading the Phirehose-library, according to this post: http://140dev.com/twitter-api-programming-blog/upgrade-phirehose-now-for-continued-streaming-api-access/
BUT: I also needed to change the caps lock in OauthPhirehouse.php at the first line, from:
require_once('Phirehose.php'); to: require_once('phirehose.php');
And i also had to change the name of Phirehose.php to phirehose.php (all small letters).