diff -r b5fb023cdb7b -r 0f1044b7a3af src/lemon/erasable_graph_extender.h
--- a/src/lemon/erasable_graph_extender.h	Wed Nov 10 21:59:59 2004 +0000
+++ b/src/lemon/erasable_graph_extender.h	Thu Nov 11 09:31:55 2004 +0000
@@ -32,12 +32,12 @@
 	Parent::firstIn(edge, node);
       }
 
-      Parent::getNodeObserverRegistry().erase(node);
+      Parent::getObserverRegistry(Node()).erase(node);
       Parent::erase(node);
     }
     
     void erase(const Edge& edge) {
-      Parent::getEdgeObserverRegistry().erase(edge);
+      Parent::getObserverRegistry(Edge()).erase(edge);
       Parent::erase(edge);
     }