Statuses are not updated through twitter API

[Volderr]

Starting from 1st of September 2010 - the statuses are not published through twitter API.
I have not changed anything in the code and it was working fine for a long time.

Looks like the problem is with something changed on twitter oauth side, e.g. here mentioned the similar problem for another library: http://codeigniter.com/forums/viewthread/166167/

Could you fix this for your library?

I use basic authentication:

$this->CI->load->library('twitter');
$this->CI->twitter->auth($this->CI->config->item('twitter_name'),$this->CI->config->item('twitter_password'));
$this->CI->twitter->update($twitter_message);