diff -r a1f9a4d4ea0c -r 4c63ff4e16fa src/lemon/graph_wrapper.h
--- a/src/lemon/graph_wrapper.h	Sun Mar 27 15:59:04 2005 +0000
+++ b/src/lemon/graph_wrapper.h	Mon Mar 28 23:34:26 2005 +0000
@@ -734,7 +734,7 @@
       Parent::firstIn(i, n); 
       i.backward=false;
       while (*static_cast<GraphEdge*>(&i)!=INVALID && 
-	     !(*forward_filter)[i]) Parent::nextOut(i);
+	     !(*forward_filter)[i]) Parent::nextIn(i);
       if (*static_cast<GraphEdge*>(&i)==INVALID) {
 	Parent::firstOut(i, n); 
 	i.backward=true;