it's a php error. gerald probably broke it by talking nonsense.
I think we can rule that out, as it would have been broken years ago.
Its a server issue. Apparently we've been "upgraded" :roll:
I've had a reply from the company that we get the hosting through :-
Rackspace, our server provider, updated the Operating System yesterday with the latest anti-spam software updates / amongst other features and made this security change. It has been raised as an emergency with them and is being investigated at the moment. I will inform the engineer that they should verify your site is functioning correctly before it is classed as resolved.