diff -r bd97feae7d90 -r 7a24bb2e7480 src/lemon/undir_graph_extender.h
--- a/src/lemon/undir_graph_extender.h	Fri Jan 07 08:50:38 2005 +0000
+++ b/src/lemon/undir_graph_extender.h	Fri Jan 07 18:53:02 2005 +0000
@@ -140,53 +140,55 @@
 
     template <typename E>
     void _dirFirstOut(E &e, const Node &n) const {
-      Parent::firstOut(e,n);
+      Parent::firstIn(e,n);
       if( UndirEdge(e) != INVALID ) {
-	e.forward = true;
+	e.forward = false;
       }
       else {
-	Parent::firstIn(e,n);
-	e.forward = false;
+	Parent::firstOut(e,n);
+	e.forward = true;
       }
     }
     template <typename E>
     void _dirFirstIn(E &e, const Node &n) const {
-      Parent::firstIn(e,n);
+      Parent::firstOut(e,n);
       if( UndirEdge(e) != INVALID ) {
-	e.forward = true;
+	e.forward = false;
       }
       else {
-	Parent::firstOut(e,n);
-	e.forward = false;
+	Parent::firstIn(e,n);
+	e.forward = true;
       }
     }
 
     template <typename E>
     void _dirNextOut(E &e) const {
-      if( e.forward ) {
+      if( ! e.forward ) {
+	Node n = Parent::target(e);
+	Parent::nextIn(e);
+	if( UndirEdge(e) == INVALID ) {
+	  Parent::firstOut(e, n);
+	  e.forward = true;
+	}
+      }
+      else {
+	Parent::nextOut(e);
+      }
+    }
+    template <typename E>
+    void _dirNextIn(E &e) const {
+      if( ! e.forward ) {
+	Node n = Parent::source(e);
 	Parent::nextOut(e);
 	if( UndirEdge(e) == INVALID ) {
-	  Parent::firstIn(e, Parent::source(e));
-	  e.forward = false;
+	  Parent::firstIn(e, n);
+	  e.forward = true;
 	}
       }
       else {
 	Parent::nextIn(e);
       }
     }
-    template <typename E>
-    void _dirNextIn(E &e) const {
-      if( e.forward ) {
-	Parent::nextIn(e);
-	if( UndirEdge(e) == INVALID ) {
-	  Parent::firstOut(e, Parent::target(e));
-	  e.forward = false;
-	}
-      }
-      else {
-	Parent::nextOut(e);
-      }
-    }
 
   public:
 
@@ -226,7 +228,7 @@
     }
 
 
-    int maxId(Node n) const {
+    int maxId(Node) const {
       return Parent::maxId(Node());
     }