Yes, I could use some help with a workaround.
I'm using PHP and trying to decrypt the opensocial_token.
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CFB), MCRYPT_RAND);
echo mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $_CONFIG['MySecret'], $_REQUEST['opensocial_token'], MCRYPT_MODE_CFB, ...