Expired timestamp, yours 1280436615, ours 1283718770
<hr />
OAuthRequest Object
(
    [parameters:OAuthRequest:private] => Array
        (
            [oauth_version] => 1.0
            [oauth_nonce] => cd77f0ec16bbc573c40c0c67225422de
            [oauth_timestamp] => 1280436615
            [oauth_consumer_key] => key
            [oauth_token] => requestkey
            [oauth_signature_method] => HMAC-SHA1
            [oauth_signature] => S8qeZW3K38u3Zt3cqk7PA+UimCc=
        )

    [http_method:OAuthRequest:private] => GET
    [http_url:OAuthRequest:private] => http://anarkystic.com/oauth/example/access_token.php?oauth_version=1.0&oauth_nonce=cd77f0ec16bbc573c40c0c67225422de&oauth_timestamp=1280436615&oauth_consumer_key=key&oauth_token=requestkey&oauth_signature_method=HMAC-SHA1&oauth_signature=S8qeZW3K38u3Zt3cqk7PA%2BUimCc%3D
    [base_string] => 
)