Any idea/suggestion ?
EDIT: Here is the code of the wp plugin + what is used in the posts to display the widget (can't show the plugin as it is hundreds of lines long, I can only say that it's working on a classical server) :
Post data used to display the widget :
The widget is supposed to be able to display two kinds of widget : an album and a map version. The album version works (with a API call using json-p), however, the map version does not work (API call using json-p + google maps call). The google scripts are in the page.