Expired timestamp, yours 1268263276, ours 1283977611
<hr />
OAuthRequest Object
(
    [parameters:OAuthRequest:private] => Array
        (
            [oauth_version] => 1.0
            [oauth_nonce] => df513b822bd50c2c4260770d947a2bd4
            [oauth_timestamp] => 1268263276
            [oauth_consumer_key] => key
            [oauth_signature_method] => HMAC-SHA1
            [oauth_signature] => WwFbzclSO2StbFrGkz54fefIxLQ=
        )

    [http_method:OAuthRequest:private] => GET
    [http_url:OAuthRequest:private] => http://an9.org/oauth/example/request_token.php?oauth_version=1.0&oauth_nonce=df513b822bd50c2c4260770d947a2bd4&oauth_timestamp=1268263276&oauth_consumer_key=key&oauth_signature_method=HMAC-SHA1&oauth_signature=WwFbzclSO2StbFrGkz54fefIxLQ%3D
    [base_string] => 
)