diff -r 9535436aaa9f -r 2c5f81b35269 lemon/graph_utils.h
--- a/lemon/graph_utils.h	Tue Apr 18 22:59:33 2006 +0000
+++ b/lemon/graph_utils.h	Tue Apr 25 14:48:50 2006 +0000
@@ -444,7 +444,7 @@
             b = g.source(e) == u;
             g.nextInc(e, b);
           }
-          while (e != INVALID && g.target(e) != v) {
+          while (e != INVALID && (b ? g.target(e) : g.source(e)) != v) {
             g.nextInc(e, b);
           }
         } else {