I seem to have uncovered a bug on the Facebook API.
This is related to the picture related to an event.
When retrieving pictures through the graph for profiles and events you should use the following link:
http://graph.facebook.com/{eventid}/picture
For events that have already occurred (i.e in the past) this works as expected, but when you try to retrieve the picture for a forthcoming event, such as:
https://graph.facebook.com/323879667682222/picture
The actual image can not be found and the default grey icon is shwown.
(ps. the link above is related to an event scheduled to occur on 3rd May)
Can you please confirm that this is a bug, and if there is any other way to retrieve event images from the graph.
Thanks,
Wez
You can retrieve the event profile image with an FQL query like this:
This call returns urls to the event profile image in 4 sizes:
You can read more about the event table fields in the Facebook Developer pages: FQL Event table.