Thanks for the reply. On one website, I'm accessing the timeline for a protected account; on the other website, the account is not protected. For both, I'm using this URL: https://api.twitter.com/statuses/user_timeline.xml. Both stopped working last week.
The oauth example script I posted above requests the oauth token and secret from the account, then passes it back with the request (you can see that by checking the $params value before the request). In my own script, I simply have the token and secret saved in constants and then I pass them from there. Neither approach is working for me now. I did notice that the token and secret returned by the request_token API call are different from the token and secret that I see displayed on the my_token page in my Twitter account (https://dev.twitter.com/apps/ nnnnnn/my_token), and the values returned from the API are different every time. Does that tell us anything? Here's what my request_token request looks like: POST https://api.twitter.com/oauth/request_token Authorization: OAuth realm="", oauth_signature_method="HMAC-SHA1", oauth_signature="[27 characters]%3D", oauth_nonce="[13 characters]", oauth_timestamp="1308241110", oauth_token="", oauth_consumer_key="[consumer key]", oauth_version="1.0" Content-Type: application/x-www-form-urlencoded This returns values for oauth_token, oauth_token_secret and oauth_callback_confirmed (but the token values don't match what I see in my account). Here's what my user_timeline request looks like: GET https://api.twitter.com/statuses/user_timeline.xml Authorization: OAuth realm="", oauth_token="[oauth token]", oauth_token_secret="[oauth token secret]", oauth_signature_method="HMAC-SHA1", oauth_signature="[27 characters] %3D", oauth_nonce="[13 characters]", oauth_timestamp="1308241629", oauth_consumer_key="[consumer key]", oauth_version="1.0" This returns the 401 error whether I send the token values returned by request_token or the token values I got from my account. -- Twitter developer documentation and resources: https://dev.twitter.com/doc API updates via Twitter: https://twitter.com/twitterapi Issues/Enhancements Tracker: https://code.google.com/p/twitter-api/issues/list Change your membership to this group: https://groups.google.com/forum/#!forum/twitter-development-talk
