Hi drekaz21
Thanks for your reply. Could I clarify a number of the points you make.,
When I update plugins and any posts then log out ( as Admin) , are suggesting that I won't see the updates ( due to non caching / not updating CDN). I know the HTTP code 404 but I have don't think I have ever encountered the 404.php as yet but I guess it gets routed to when there is 404 error.
Ok I deactivate all plugins inc firewall, twitter tools etc then clear cache and then reactivate all. I will need to activate W3TotalCache again.
Finally, I had a look on your site - which has some useful stuff btw but could not find anything on the Google Page Tool - I think you are referring to . I have signed up for this as this invite only apparently.