Index: trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/relations/MultipolygonCache.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/relations/MultipolygonCache.java	(revision 7682)
+++ trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/relations/MultipolygonCache.java	(revision 7683)
@@ -239,5 +239,5 @@
     @Override
     public void tagsChanged(TagsChangedEvent event) {
-        // Do nothing
+        updateMultipolygonsReferringTo(event);
     }