My setup is like this:
Based on this example http://arshaw.com/js/fullcalendar/examples/json.html I tried to get my own fullcalendar application working. I replaced 'events: "json-events.php",' with 'events: "http://localhost:8080/CalendarServletTest/HelloWorldServlet",' and changed the dataType of fullcalendar to 'jsonp'. (The Servlet is hosted on a Tomcat 6 server)
As a first try my servlet responses were just hardcoded to "[{"id":111,"title":"Event1","start":"2010-05-10","url":"http:\/\/yahoo.com\/"},{"id":222,"title":"Event2","start":"2010-05-20","end":"2010-05-22","url":"http:\/\/yahoo.com\/"}]" which is exactly the json feed used in the fullcalendar example linked above. However, my fullcalendar application isn't showing any events and Bugzilla does not show any errors in it's console.
I'm really confused by this behavior... anybody got any ideas why fullcalendar works in the linked example, but not in my scenario?