Index: applications/editors/josm/plugins/tagging-preset-tester/src/org/openstreetmap/josm/plugins/taggingpresettester/TaggingCellRenderer.java
===================================================================
--- applications/editors/josm/plugins/tagging-preset-tester/src/org/openstreetmap/josm/plugins/taggingpresettester/TaggingCellRenderer.java	(revision 29724)
+++ applications/editors/josm/plugins/tagging-preset-tester/src/org/openstreetmap/josm/plugins/taggingpresettester/TaggingCellRenderer.java	(revision 29725)
@@ -34,9 +34,11 @@
         else {
             if (a.types == null)
-                l.setIcon(ImageProvider.get("data", "empty"));
+                icon = ImageProvider.getIfAvailable("data", "empty");
             else if (a.types.size() != 1)
-                l.setIcon(ImageProvider.get("data", "object"));
+                icon = ImageProvider.getIfAvailable("data", "object");
             else
-                l.setIcon(ImageProvider.get(a.types.iterator().next().getIconName()));
+                icon = ImageProvider.getIfAvailable(a.types.iterator().next().getIconName());
+            if (icon != null)
+                l.setIcon(icon);
         }
         l.setOpaque(true);