Print of variables on submission

Hi, im not sure if I have done something wrong here, but on a fresh install when a webform is submitted I am getting a full print out of Email Headers, $form_values and $_SERVER and $_POST. An example being:

$_POST is:

Array
(
[submitted] => Array
(
[hidden] => Quick Apply for Job from Website
[name] => james riley
[email] => j***@****.***
[tel_no] => 888888888
)

[details] => Array
(
[email_subject] => 1
[email_from_name] => default
[email_from_address] => default
)

[form_id] => webform_client_form_18
[op] => Submit
)

Following this is the usual submission text saying thank you etc...

Has this happened for anybody else?