diff -r 7b6466ed488a -r 2d87dbd7f8c8 lemon/smart_graph.h
--- a/lemon/smart_graph.h	Fri Nov 07 13:04:54 2008 +0000
+++ b/lemon/smart_graph.h	Fri Nov 07 13:14:22 2008 +0000
@@ -737,8 +737,8 @@
         dir.push_back(arcFromId(n));
         dir.push_back(arcFromId(n-1));
         Parent::notifier(Arc()).erase(dir);
-        nodes[arcs[n].target].first_out=arcs[n].next_out;
-        nodes[arcs[n-1].target].first_out=arcs[n-1].next_out;
+        nodes[arcs[n-1].target].first_out=arcs[n].next_out;
+        nodes[arcs[n].target].first_out=arcs[n-1].next_out;
         arcs.pop_back();
         arcs.pop_back();
       }