ahhh, interesting. Thanks mawenzi. So if my field is like this...
$additional_image_fields['image_location'] = array($lang['user_im_location'], "text", 0);
Would it look something like this then?
additional_image_fields['image_location']= un_htmlspecialchars(trim($HTTP_POST_VARS['user_im_location']));
what about the lang reference?