Index: trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ImageViewerDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ImageViewerDialog.java	(revision 18944)
+++ trunk/src/org/openstreetmap/josm/gui/layer/geoimage/ImageViewerDialog.java	(revision 18945)
@@ -981,4 +981,6 @@
         if (imageChanged) {
             cancelLoadingImage();
+            // don't show unwanted image
+            imgDisplay.setImage(null);
             // Set only if the image is new to preserve zoom and position if the same image is redisplayed
             // (e.g. to update the OSD).