Help with Places no longer working in iPhoto 9

Since an update about a month ago, Places no longer works with iPhoto 9 version 8.1.2 (424). Where GPS data is present, the map tries to open but all I get is a dull green screen where the map should be. My Nikon View software Geotag works with the same images so the problem appears to be with iPhoto. Has anyone any idea on how to fix it? Would upgrading to iPhoto 11 solve it?