Hey Stuart,
Please learn not to post your admin info in PUBLIC forums! I said mail, not forum! I would advise you to immediately change your administrator password!
Now the map is working, I've disabled the system cache plugin.
I'll try to reproduce the error message with the joomla library, but a quick browse in google is showing 10000s of websites that experience the same. I suspect that this is a problem related to your specific php and db version.
anyway - it is working now.
Kind regards,
Daniel
P.S. If you like my support, please post a short review here:
extensions.joomla.org/extensions/maps-a-...-locations/maps/9468