Index: trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ThumbsLoader.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ThumbsLoader.java	(revision 17855)
+++ trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ThumbsLoader.java	(revision 17856)
@@ -75,5 +75,5 @@
     public void run() {
         Logging.debug("Load Thumbnails");
-        tracker = new MediaTracker(MainApplication.getMap().mapView);
+        tracker = new MediaTracker(MainApplication.isDisplayingMapView() ? MainApplication.getMap().mapView : MainApplication.getMainPanel());
         for (ImageEntry entry : data) {
             if (stop) return;