Index: /trunk/src/org/openstreetmap/josm/gui/tagging/presets/items/ComboMultiSelect.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/tagging/presets/items/ComboMultiSelect.java	(revision 16732)
+++ /trunk/src/org/openstreetmap/josm/gui/tagging/presets/items/ComboMultiSelect.java	(revision 16733)
@@ -352,5 +352,6 @@
             if (!usage.hadKeys() || PROP_FILL_DEFAULT.get() || isForceUseLastAsDefault()) {
                 // selected osm primitives are untagged or filling default feature is enabled
-                itemToSelect = getListEntry(def).getDisplayValue();
+                PresetListEntry entry = getListEntry(def);
+                itemToSelect = entry == null ? "" : entry.getDisplayValue();
             } else {
                 // selected osm primitives are tagged and filling default feature is disabled