Hi there – sorry, forgot about the May post. It might well be the same thing. That’s a good point about debug.log, apologies for not looking there. What I see there is:
[22-Dec-2014 19:26:26] PHP Fatal error: Call to undefined method Mappress_Poi::get_custom() in /nas/wp/www/staging/chrisrae/wp-content/themes/kingtides/map_poi.php on line 8
It looks like that should help quite a bit!